FreeSwipeScript's working & bugs correction

FreeSwipeScript is working (as you can move a character with it) but
some improvements have to be done :
-Set a dead Zone
- Set the swipeRadius in a unit that depend of the screen (size &
density or whatever ..) The same thing has to be done in
DirectionalSwipeScript.

Bug correction :
Detection Window was totally bugged except for the BottomLeft corner.
It's okay now.