add access module - bare bones, but intercepts all mouse events and

add access module - bare bones, but intercepts all mouse events and
handles gestures and passes on commands to the focused app or maybe
fakes a tap event on the screen location - depending. things that
could be done here:

1. config to select which actions happen as a result of which
events/gestures
2. config to determine which zones get this access setup and whihc
don't.

SVN revision: 71323