feature(bootstrap3): go flat and responsive
fix(css): reorder css rules to have them applied correctly
fix(animation): add the missing closing curly brace in template
feat(css): remove dependency on font-awesome

- use the glyphicons provided with bootstrap3
- fix the example without previous button
- improve the CSS for animations
- improve the media queries and adapt size of icons in result
Merge pull request #5 from Ninja-Squad/bootstrap3

feature(bootstrap3): go flat and responsive