Port form Bootstrap CSS over to SASS

- ported bootstrap over to sass
- added compass SASS compilation task
- added watch task for compass
- added bootstrap-sass-official to bower.json
- removed css-lint from package.json
- removed you-shall-not-commit from package.json as it was failing to
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- removed style.css as it now gets generated by gulp compass task
- added .css files to the .gitignore file
- updated div classes in templates so they read better
- updated read me to replace css lint with compass