skinning-v2-additional: Replace the transcript expand image
skinning-v2-additional: Switch to sans-serif font for transcript text
skinning-v2-additional: Increase size of transcript box
skinning-v2-additional: Fixes color and backound of active transcript
Merge pull request #23 from edx-solutions/skinning-v2-additional

Skinning v2 - Additional fixes
skinning-v2-additional: Load transcript CSS through XBlock resources

To fix presentation issue on IE & Studio.
Merge pull request #24 from edx-solutions/skinning-v2-additional

skinning-v2-additional: Load transcript CSS through XBlock resources
skinning-v2-additional: Clear button padding from runtime environment
Merge pull request #25 from edx-solutions/skinning-v2-additional

skinning-v2-additional: Clear button padding from runtime environment
search-padding: Ignore temporary files
search-padding: Adjust transcript search box to remove icon spacing
Add workbench scenario
Test player token generation
Extract sub-functions from generate_player_token
Add more unittest for tokens
Add tests for studio_submit
Add tests for overlays