Evas: Add proper EO events with info for mouse inputs

This adds a few classes, in particular Efl.Event and Efl.Event.Point
which are used as the event info for all pointer (mouse, multi) call

Using an eo object as event info will allow for future extensions
really easily. We don't need to expose any of the internals, also
a single type can be used for all pointer events.

Still TODO:
 - Keyboard events (urgent)
 - Axis / Joystick events (needs porting from Tizen)
 - Gestures support (probably later)
 - Event feeding from app side (manual feed)

Not going to be ported to EO:
 - Hold API and hold event. Seems barely used.

The new APIs are not very much tested at this point, and rely on the
old legacy event system. The most important thing right now is to
ensure that nothing was broken so far. Unfortunately I can only do
this much testing myself...

Merge branch 'devs/jpeg/work'