v0.6.0

Added

• 3PlayMedia support. Now you can fetch transcripts for your video from 3PM.
• Open edX settings support. Now administrators can set default values
  for VideoXBlock on a system-wide level.

Changed

• Swith from Coveralls to Codecov for better code coverage.
• Interactive transcripts now align current line to the middle of video frame.

Fixed

• Interactive transcripts automscrolling for Brightcove videos.