Drag/Drop, SpotPicker, video recording

-some DragDrop functions rearranged and tweaked.
-SpotPicker utility added (filed under examples for now)
-video/audio recording works, find a demo under examples in video-test (requires vorbis-tools package and mencoder from ubuntu installer.)
ScreenVideoRecorder demo and readme
	-there is now a screenVideoRecorder demo, filed in examples under Video-Test.
	-this file also includes a python script to compile the AVI after the experiment is done.