added samples (forgot them previously:/)
Merge pull request #6 from 513/master

Thanks !
closes #3
- added input(), started form()
- updated button() with submit and reset buttons
- updated demo with input
Added image()
- Added headers()
- updated demo files
- Changed the way to handle forms
- updated inputs: value is now in $options.
Forgot to update the doc properly
Added embed(), breadcrumbs(), jumbotron() and listgroups()
updated listgroup()
Updated media()