Update project angular.bootstrap to 0.12.0

This commit adds the 0.12.0 release of UI Bootstrap from AngularUI.  The
files are the versions downloaded from
https://angular-ui.github.io/bootstrap/ as the project does not keep
built files in their repository.

Signed-off-by: Kevin Locke <kevin@kevinlocke.name>
Merge pull request #2476 from kevinoid/angular.bootstrap-0.12.0

Update project angular.bootstrap to 0.12.0