Summary:
Bundled plugins so far didn't load because the defaultPlugins was not generated yet. Fixed follow up errors that resulted from node modules not being available in the browser, and made the process more robust so that one plugin that fails to initialise doesn't kill all bundled plugins from being loaded.
Cleaned up the server scripts, and reused the BUILTINS list that is already maintained in the babel transformer.
Report errors during the build process if modules are referred that are stubbed out (later on we could maybe error on that)
Reviewed By: aigoncharov
Differential Revision: D33020243
fbshipit-source-id: 3ce13b0049664b5fb19c1f45f0b33c1d7fdbea4c
