Add private function to get the window hash.

Add private function to get the window hash.
When destroying window, also destroy animator callback.
Change ecore_wl_window_damage function to Only do damage.
Add separate ecore_wl_window_commit function to push those accumulated
damages.
In ecore_wl_window_surface_create, if the window already has a
surface, return that ... Not Null.
During window show, only create a shell_surface if it does not Already
exist.

Signed-off-by: Chris Michael <cp.michael@samsung.com>