* Added build:test task to generate translation JS for tests.
* Removed test/spec/translations.js from the repository, added to .gitignore.
* Updated test/run_tests.sh to run build:test, and accept an optional argument
to run a particular test suite.
* Repair broken e2e test introduced in 8d03cfc (copywriting change was not
reflected in the spec)
* Updated i18n.coffee code to be more cautious (it expected the 'en' locale
would always be available, but provides appropriate error handling as-is).
* Extended timeout duration for protractor, as registration was slightly above
30s.
* Added karma-mocha-reporter as a dev dependency to ensure test visibility.
