add abstract tone shader

added halftone shader

Detect feature support and show error message if not all the features are available. Shows also what this is and links to source and troubleshooting when the error message is closed, so users are not totally lost. Fixes #20

Refactor onload function for less nesting

Remove old unused 'dist' task

Simplify inverted shader

Merge commit 'bd3f05dc60aa405806df7f896e39ad47219055b9'

Adding timestamp to video filename

Added shader: Inverted

Merge pull request #22 from mozdevs/burnt-shader

add burnt shader

Mute video while recording to prevent MEGA audio feedback

get rid of extra classes

fix styles of bottom controls

Voilà, resizing!