haar-cascade-only for blink detection

works better than expected
stimulate triggered by a counter
some refactoring
seperate UI and EyeTracking thread

flash widget not working properly yet.
some refactoring
still have thread killing problem but for now...
Merge branch 'temp(Threading)' into haar-cascade-only
Merge branch 'haar-cascade-only'
Merge branch 'haar-cascade-only'