Merge branch 'release/2.0.2' into develop
Bumped version to SNAPSHOT
Added support for callback.

Added support for commitish. Closes mikaelkaron/grunt-git-describe#9
Added support for templating. Closes mikaelkaron/grunt-git-describe#8
Add example for template
Fix `callback`
Bumped jshint version and updated .jshint options.

Bumped version to RELEASE
Merge branch 'master' into release/2.1.0
Merge branch 'release/2.1.0'