update grunt dependencies
Merge pull request #17 from gengo/update-package.json

Update Grunt dependencies
add grunt-scsslint
fix scss lint errors
fix compass %extend issue
Merge pull request #19 from gengo/add-scsslint

Add scsslint
fix conflict in merge

fix 3 conflicts in merge with master

- scss/_dropdowns.scss
- scss/_buttons.scss
- Gruntfile.coffee