Turns out jest is _incredibly_ slow at resolving require paths like `require('fbjs/lib/foo')`. Like several milliseconds per require. Really adds up when all our files require `invariant` and `warning`. Here's a temporary hack to make things fast again.
Test Plan:
```
npm test src/renderers/shared/reconciler/__tests__/ReactCompositeComponent-test.js
```
has a self-proclaimed runtime of ~8 seconds now instead of ~35 seconds.
This reworks a few things in building and distributing React. The biggest change is using fbjs to share dependencies with other libraries. We're also using Gulp for some build steps.
Created a .mailmap file with all of the associations, then used
git + perl to create the AUTHORS file. In theory these should all get
picked up by npm.
I used ABC order so it would remain unbiased and automatable. I wish we
could go back and fill out the history or at least fix the commits we
have from CommitSyncScript, but oh well.
This also includes the script I used to automate this process in the
future.
