diff --git a/.gitignore b/.gitignore
index 5b346768..8a2620f5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,3 +8,6 @@
 
 # Visual studio code
 .vscode
+
+# Xcode
+xcuserdata
\ No newline at end of file
diff --git a/YogaKit/YogaKit/YogaKit.xcodeproj/project.xcworkspace/xcuserdata/david.xcuserdatad/UserInterfaceState.xcuserstate b/YogaKit/YogaKit/YogaKit.xcodeproj/project.xcworkspace/xcuserdata/david.xcuserdatad/UserInterfaceState.xcuserstate
index daec9dbc..b9c1ca19 100644
Binary files a/YogaKit/YogaKit/YogaKit.xcodeproj/project.xcworkspace/xcuserdata/david.xcuserdatad/UserInterfaceState.xcuserstate and b/YogaKit/YogaKit/YogaKit.xcodeproj/project.xcworkspace/xcuserdata/david.xcuserdatad/UserInterfaceState.xcuserstate differ
diff --git a/YogaKit/YogaKit/YogaKit.xcodeproj/project.xcworkspace/xcuserdata/emilsj.xcuserdatad/UserInterfaceState.xcuserstate b/YogaKit/YogaKit/YogaKit.xcodeproj/project.xcworkspace/xcuserdata/emilsj.xcuserdatad/UserInterfaceState.xcuserstate
deleted file mode 100644
index 47db969a..00000000
Binary files a/YogaKit/YogaKit/YogaKit.xcodeproj/project.xcworkspace/xcuserdata/emilsj.xcuserdatad/UserInterfaceState.xcuserstate and /dev/null differ
diff --git a/YogaKit/YogaKit/YogaKit.xcodeproj/xcuserdata/david.xcuserdatad/xcschemes/YogaKitSample.xcscheme b/YogaKit/YogaKit/YogaKit.xcodeproj/xcuserdata/david.xcuserdatad/xcschemes/YogaKitSample.xcscheme
deleted file mode 100644
index 4e3a92d9..00000000
--- a/YogaKit/YogaKit/YogaKit.xcodeproj/xcuserdata/david.xcuserdatad/xcschemes/YogaKitSample.xcscheme
+++ /dev/null
@@ -1,91 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<Scheme
-   LastUpgradeVersion = "0820"
-   version = "1.3">
-   <BuildAction
-      parallelizeBuildables = "YES"
-      buildImplicitDependencies = "YES">
-      <BuildActionEntries>
-         <BuildActionEntry
-            buildForTesting = "YES"
-            buildForRunning = "YES"
-            buildForProfiling = "YES"
-            buildForArchiving = "YES"
-            buildForAnalyzing = "YES">
-            <BuildableReference
-               BuildableIdentifier = "primary"
-               BlueprintIdentifier = "13687D421DF8748300E7C260"
-               BuildableName = "YogaKitSample.app"
-               BlueprintName = "YogaKitSample"
-               ReferencedContainer = "container:YogaKit.xcodeproj">
-            </BuildableReference>
-         </BuildActionEntry>
-      </BuildActionEntries>
-   </BuildAction>
-   <TestAction
-      buildConfiguration = "Debug"
-      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
-      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      shouldUseLaunchSchemeArgsEnv = "YES">
-      <Testables>
-      </Testables>
-      <MacroExpansion>
-         <BuildableReference
-            BuildableIdentifier = "primary"
-            BlueprintIdentifier = "13687D421DF8748300E7C260"
-            BuildableName = "YogaKitSample.app"
-            BlueprintName = "YogaKitSample"
-            ReferencedContainer = "container:YogaKit.xcodeproj">
-         </BuildableReference>
-      </MacroExpansion>
-      <AdditionalOptions>
-      </AdditionalOptions>
-   </TestAction>
-   <LaunchAction
-      buildConfiguration = "Debug"
-      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
-      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      launchStyle = "0"
-      useCustomWorkingDirectory = "NO"
-      ignoresPersistentStateOnLaunch = "NO"
-      debugDocumentVersioning = "YES"
-      debugServiceExtension = "internal"
-      allowLocationSimulation = "YES">
-      <BuildableProductRunnable
-         runnableDebuggingMode = "0">
-         <BuildableReference
-            BuildableIdentifier = "primary"
-            BlueprintIdentifier = "13687D421DF8748300E7C260"
-            BuildableName = "YogaKitSample.app"
-            BlueprintName = "YogaKitSample"
-            ReferencedContainer = "container:YogaKit.xcodeproj">
-         </BuildableReference>
-      </BuildableProductRunnable>
-      <AdditionalOptions>
-      </AdditionalOptions>
-   </LaunchAction>
-   <ProfileAction
-      buildConfiguration = "Release"
-      shouldUseLaunchSchemeArgsEnv = "YES"
-      savedToolIdentifier = ""
-      useCustomWorkingDirectory = "NO"
-      debugDocumentVersioning = "YES">
-      <BuildableProductRunnable
-         runnableDebuggingMode = "0">
-         <BuildableReference
-            BuildableIdentifier = "primary"
-            BlueprintIdentifier = "13687D421DF8748300E7C260"
-            BuildableName = "YogaKitSample.app"
-            BlueprintName = "YogaKitSample"
-            ReferencedContainer = "container:YogaKit.xcodeproj">
-         </BuildableReference>
-      </BuildableProductRunnable>
-   </ProfileAction>
-   <AnalyzeAction
-      buildConfiguration = "Debug">
-   </AnalyzeAction>
-   <ArchiveAction
-      buildConfiguration = "Release"
-      revealArchiveInOrganizer = "YES">
-   </ArchiveAction>
-</Scheme>
diff --git a/YogaKit/YogaKit/YogaKit.xcodeproj/xcuserdata/david.xcuserdatad/xcschemes/xcschememanagement.plist b/YogaKit/YogaKit/YogaKit.xcodeproj/xcuserdata/david.xcuserdatad/xcschemes/xcschememanagement.plist
deleted file mode 100644
index 9ee20b37..00000000
--- a/YogaKit/YogaKit/YogaKit.xcodeproj/xcuserdata/david.xcuserdatad/xcschemes/xcschememanagement.plist
+++ /dev/null
@@ -1,32 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
-<plist version="1.0">
-<dict>
-	<key>SchemeUserState</key>
-	<dict>
-		<key>YogaKit.xcscheme_^#shared#^_</key>
-		<dict>
-			<key>orderHint</key>
-			<integer>1</integer>
-		</dict>
-		<key>YogaKitSample.xcscheme</key>
-		<dict>
-			<key>orderHint</key>
-			<integer>0</integer>
-		</dict>
-	</dict>
-	<key>SuppressBuildableAutocreation</key>
-	<dict>
-		<key>13687D421DF8748300E7C260</key>
-		<dict>
-			<key>primary</key>
-			<true/>
-		</dict>
-		<key>63EE083C1E06ED3D00EE5F9A</key>
-		<dict>
-			<key>primary</key>
-			<true/>
-		</dict>
-	</dict>
-</dict>
-</plist>
diff --git a/YogaKit/YogaKit/YogaKit.xcodeproj/xcuserdata/emilsj.xcuserdatad/xcschemes/YogaKitSample.xcscheme b/YogaKit/YogaKit/YogaKit.xcodeproj/xcuserdata/emilsj.xcuserdatad/xcschemes/YogaKitSample.xcscheme
deleted file mode 100644
index e785e85e..00000000
--- a/YogaKit/YogaKit/YogaKit.xcodeproj/xcuserdata/emilsj.xcuserdatad/xcschemes/YogaKitSample.xcscheme
+++ /dev/null
@@ -1,91 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<Scheme
-   LastUpgradeVersion = "0810"
-   version = "1.3">
-   <BuildAction
-      parallelizeBuildables = "YES"
-      buildImplicitDependencies = "YES">
-      <BuildActionEntries>
-         <BuildActionEntry
-            buildForTesting = "YES"
-            buildForRunning = "YES"
-            buildForProfiling = "YES"
-            buildForArchiving = "YES"
-            buildForAnalyzing = "YES">
-            <BuildableReference
-               BuildableIdentifier = "primary"
-               BlueprintIdentifier = "13687D421DF8748300E7C260"
-               BuildableName = "YogaKitSample.app"
-               BlueprintName = "YogaKitSample"
-               ReferencedContainer = "container:YogaKitSample.xcodeproj">
-            </BuildableReference>
-         </BuildActionEntry>
-      </BuildActionEntries>
-   </BuildAction>
-   <TestAction
-      buildConfiguration = "Debug"
-      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
-      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      shouldUseLaunchSchemeArgsEnv = "YES">
-      <Testables>
-      </Testables>
-      <MacroExpansion>
-         <BuildableReference
-            BuildableIdentifier = "primary"
-            BlueprintIdentifier = "13687D421DF8748300E7C260"
-            BuildableName = "YogaKitSample.app"
-            BlueprintName = "YogaKitSample"
-            ReferencedContainer = "container:YogaKitSample.xcodeproj">
-         </BuildableReference>
-      </MacroExpansion>
-      <AdditionalOptions>
-      </AdditionalOptions>
-   </TestAction>
-   <LaunchAction
-      buildConfiguration = "Debug"
-      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
-      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      launchStyle = "0"
-      useCustomWorkingDirectory = "NO"
-      ignoresPersistentStateOnLaunch = "NO"
-      debugDocumentVersioning = "YES"
-      debugServiceExtension = "internal"
-      allowLocationSimulation = "YES">
-      <BuildableProductRunnable
-         runnableDebuggingMode = "0">
-         <BuildableReference
-            BuildableIdentifier = "primary"
-            BlueprintIdentifier = "13687D421DF8748300E7C260"
-            BuildableName = "YogaKitSample.app"
-            BlueprintName = "YogaKitSample"
-            ReferencedContainer = "container:YogaKitSample.xcodeproj">
-         </BuildableReference>
-      </BuildableProductRunnable>
-      <AdditionalOptions>
-      </AdditionalOptions>
-   </LaunchAction>
-   <ProfileAction
-      buildConfiguration = "Release"
-      shouldUseLaunchSchemeArgsEnv = "YES"
-      savedToolIdentifier = ""
-      useCustomWorkingDirectory = "NO"
-      debugDocumentVersioning = "YES">
-      <BuildableProductRunnable
-         runnableDebuggingMode = "0">
-         <BuildableReference
-            BuildableIdentifier = "primary"
-            BlueprintIdentifier = "13687D421DF8748300E7C260"
-            BuildableName = "YogaKitSample.app"
-            BlueprintName = "YogaKitSample"
-            ReferencedContainer = "container:YogaKitSample.xcodeproj">
-         </BuildableReference>
-      </BuildableProductRunnable>
-   </ProfileAction>
-   <AnalyzeAction
-      buildConfiguration = "Debug">
-   </AnalyzeAction>
-   <ArchiveAction
-      buildConfiguration = "Release"
-      revealArchiveInOrganizer = "YES">
-   </ArchiveAction>
-</Scheme>
diff --git a/YogaKit/YogaKit/YogaKit.xcodeproj/xcuserdata/emilsj.xcuserdatad/xcschemes/xcschememanagement.plist b/YogaKit/YogaKit/YogaKit.xcodeproj/xcuserdata/emilsj.xcuserdatad/xcschemes/xcschememanagement.plist
deleted file mode 100644
index 336f995f..00000000
--- a/YogaKit/YogaKit/YogaKit.xcodeproj/xcuserdata/emilsj.xcuserdatad/xcschemes/xcschememanagement.plist
+++ /dev/null
@@ -1,22 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
-<plist version="1.0">
-<dict>
-	<key>SchemeUserState</key>
-	<dict>
-		<key>YogaKitSample.xcscheme</key>
-		<dict>
-			<key>orderHint</key>
-			<integer>0</integer>
-		</dict>
-	</dict>
-	<key>SuppressBuildableAutocreation</key>
-	<dict>
-		<key>13687D421DF8748300E7C260</key>
-		<dict>
-			<key>primary</key>
-			<true/>
-		</dict>
-	</dict>
-</dict>
-</plist>