One missing character, but still...
Merge pull request #157 from jamesarosen/pjm/makefile-typo

Minor typo
translateHelperSpec: restore Ember.Logger.warn

We were spying on Ember.Logger.warn in the beforeEach, but never
restoring it to its native behavior in an afterEach.
Makefile: check for node, npm, phantomjs

This commit moves the `npm install` command into a new
`development_dependencies` target that also ensures that `node`,
`npm`, and `phantomjs` are all available on the path.

Closes #137
Merge pull request #159 from jamesarosen/james/restore-warn

translateHelperSpec: restore Ember.Logger.warn
Merge pull request #158 from jamesarosen/james/dev-dependencies

Makefile: check for node, npm, phantomjs
Internalize pluralization

 * remove dependency on `CLDR.js`
 * add `lib/i18n-plurals.js` with pluralization logic, to be included
   after `lib/i18n.js`
 * add deprecation warning if `window.CLDR` is defined
 * look for current locale in `Ember.I18n.currentLocale` before
   falling back on `CLDR.defaultLanguage`
 * Change README to describe new process to add pluralization
   support

Closes #46

See also #49