Added DisableFading and Randomize

Added DisableFading and Randomize
removed almost all of the mp4 compile time
Merge pull request #123 from Arkkis/patch-11

Added DisableFading and Randomize
minor comment
added an audio filter API
woops, forgot the C-style exports
Added a 1:1 preview mode that is currently always enabled
Added a right-click menu item to toggle 1:1 preview mode
Recalculate the preview area when resizing the window
Merge pull request #125 from lmurray/master

1:1 preview mode