Summary:
- As mentioned in the title, this PR adds Javascript support to Yoga. Two different builds are included in this PR thanks to [nbind](https://github.com/charto/nbind), which conveniently allow to target both Node.js' native addons and browser environments via asmjs with approximately the same codebase. That should solve #215.
- All tests successfully pass on both codepaths. You can run `yarn test:all` inside the `javascript` directory to test it.
- Because of a bug in nbind, the [following PR](https://github.com/charto/nbind/pull/57) needs to be merged and a new version released before this one can be safely merged as well.
- I had to use `double` types instead of `float` in the C++ bindings because of an Emscripten [bug](https://github.com/kripken/emscripten/issues/3592) where symbols aren't correctly exported when using floats.
- There's some tweaks to do before this PR is 100% ready to merge, but I wanted to have your opinion first. What do you think of this?
---
To do:
- [x] Ensure th
Closes https://github.com/facebook/yoga/pull/304
Reviewed By: mikearmstrong001
Differential Revision: D4375187
Pulled By: emilsjolander
fbshipit-source-id: 47248558a9506b7c512b5ef281cd12fe1a60cab7
Summary: Move yoga docs into master branch so that pull requests are able to include doc updates as part of other changes.
Reviewed By: JoelMarcey
Differential Revision: D4365700
fbshipit-source-id: 2f46a88974104c454c00bcdf1257abb5c4075a68
