Merge branch 'master' into develop

* master:
  Fixed issue with enable on revisit
  Added .bowerrc
  Squashed commit of the following:
fixed issue #8
Merge pull request #9 from SpongeUK/hotfix/complete-fires-when-isComplete-becomes-false

fixed issue #8
Updated assessment quiz article to reflect changes to the mediator

Fixes #11
Updated karma version
Merge pull request #12 from adaptlearning/issue/#11

Issue/#11
Add custom css class to assessment article

Addition of custom class to assessment via id to enable custom styling
Merge pull request #13 from jasonbutler/develop

Add custom css class to assessment article
Added _isEnabled
Merge pull request #16 from adaptlearning/issue/#15

Issue/#15