Merge pull request #6 from pdobb/bootstrap-3.0.0

Add a `badge(badge_count)` helper.
Add additional methods for working with @breadcrumbs
Update README to detail the new breadcrumb helper methods.

Add tests for breadcrumbs.
Merge pull request #7 from pdobb/breadcrumbs_methods

Breadcrumbs methods
Fix exception being caused by use of `public_send` in add_breadcrumb macro