Adding wrapper for AMD lang files.
Deleting old lang-all.js files in favor of langs.js
Fixing race condition with moment.langData(unloadedLangKey)
Merge branch 'develop' into feature/lang-amd

* develop:
  Adds language definition for Nepali (Yay!)
Merging and cleaning up nepalese lang from develop
Adding failing isoWeek tests
Passing isoWeek tests
Correcting iso week tests
Fixing setUp and tearDown properties
Adding day of year failing tests
Adding passing day of year tests
Fixing last of iso week tests
Passing tests for iso weeks
Failing tests for iso week format tokens
Passing tests for iso week formats
Failing tests for english (us) locale weeks
Fixing tests for en-us
Passing tests for en-us week numbers
Fixing week formatting and reverting tests from #495 in favor of `WW` formatting
Adding comments on week definitions