Update grunt modules to latest version
Bower.json: downloads folder does not exist anymore
Update documentation in README file

This also includes an example code fragment for subscribing to
events.

Closes #63.
Add FAQ for questions we get from time to time.
Update CONTRIBUTE.md to reflect latest development changes
Add plugins folder to JSHint
Fix HTML5 Video plugin JSHint errors
Merge branch 'master' into plugin-resize