Merge tag '0.2.0' into develop

0.2.0
Start 0.3.0
Switch to Karma and add coverage.
Add coveralls.io support.
Update README.md
Move common karma config options into grunt dir
Update build wrapper
Update project settings
Add missing tests for onMediaEnd and onPlayIndex
Specify BTG dependency
Remove btg.js from src and put it in test, remove components from dist
Update History.md
Merge branch 'release/0.3.0'