update bigvideo version to 1.0.2 in bower config
Add onShown callback

Allow onShown callback to be passed to BV.show(). To be used for hiding overlays until video is shown.
Merge pull request #81 from rallysf/master

Add onShown callback
Merge remote-tracking branch 'upstream/master'

* upstream/master:
  Add onShown callback
  update bigvideo version to 1.0.2 in bower config