feat(bootstrap): Add bootstrap-compatible stylesheet

Add support for Bootstrap colors and transitions..
Merge PR #155
feat(tagsInput): Add support for some Bootstrap classes

Add support for the following Bootstrap classes:
- input-group
- input-group-lg
- input-group-sm
- input-lg (via ti-input-lg class)
- input-sm (via ti-input-sm class)
- has-feedback
- has-success
- has-error
- has-warning

Closes #78.