Summary:
For some reason this Universal.csproj wasn't pulled from rozele PR.. i added the missing files.
Added badges for build and nuget for more exposure.
Ignore a failing unit test on MacOS for a green build.
Closes https://github.com/facebook/yoga/pull/464
Reviewed By: emilsjolander
Differential Revision: D4670392
Pulled By: splhack
fbshipit-source-id: 9ea3150b92039cab87ce8696db983fdf373c5388
