Transparency is now disabled by default, so that alpha values from
injected back buffers don't propagate to OBS (e.g. Minecraft doesn't
render properly in OBS unless "Allow Transparency" is disabled)

Allows adding Syphon servers as sources, and provides game-capture if
used with SyphonInject (specifically the scripting additions have to be
installed for SyphonInject to work from within OBS)