added screencapture as bin

Conflicts:
	galicaster/classui/confui.py
forcing formats and caps since we don't like freedom. seriously: x264enc is to picky to be practical here
Merge pull request #75 from uib/screengrab

New screen device module to record a screenshot video stream.
Merge branch '1.4.x' of https://github.com/teltek/Galicaster into 1.4.x
Merge branch '1.4.x'