Possibility to use hierarchical JSON ({"ONE": {"TWO": "Something"}} called with "ONE.TWO").
Function t() shortcut for translate().
Wrap missing translations in a span with class "missing-translation".
Added tests for multi-level translations and "missing-translation" class, and linted
Updated the .travis.yml to use node version 0.8 instead of 0.8.11
Merge pull request #7 from ZorGleH/master

Possibility to use hierarchical JSON ({"ONE": {"TWO": "Something"}} call...