evas render2 work - no new feature - paralell bit of code

evas render2 work - no new feature - paralell bit of code

*this does not affect any "stable" code paths - it's render2 and some
added region code that i MAY have to use to fix some bugs/issues as i
am noticing tilebuf being pretty silly and just doing bounding boxes.
region code lifted from xserver (mit-x11 license thus compatible with
evas bsd) and it's been stripped down and cleaned up with some tilebuf
optimizations like remembering the last rect add/del to avoid work
when repetedly adding/delling the same rects (very common).