Changes enhance-css object structure to match clean-css ones.
Updates JSHint to 2.3.x.
Fixes #10 - commander for CLI options parsing.

* Changes command line options to include hyphens.
* --noembedversion becomes --no-embed-version, etc.
Drops node 0.6 support.

* Adds fallable 0.11 to the list of tested versions on Travis.
Fixes spec warnings under node 0.10.
Small tweak to tests initialization.
Merge branch 'master' of github-gs:GoalSmashers/enhance-css