Fixed Mac OS Canvas / CALayer.

http://hg.openjdk.java.net/jdk8/awt/jdk/rev/65d874d16d59
JAWT native CALayer not positioned over Canvas
(Reviewed-by: art, anthony)
Initialy, the layer bounds have the Y coord originating not as
expected. java7 only seems to provoke that issue. so cpeer would update
bounds as necessary now.
by broumbroum
Peer lookup fixed. Canvas as parent is displayed fully covered by the CALayer . Need to check if windowed Display works again.
Merge pull request #63 from b23prodtm/master

macosx CALayer Display.create() / .setParent() / setFullscreen()