-Added google play services (needed for some stuff)

-Added new screen resizing options, stretch_2d is removed, new much more flexible ones.
-Fixed bug in viewport (can create more instances in 3d-in-2d demo now)
-Can set android permissions and screen sizes manually in the export settings
-Changed export templates extension to .tpz (too many people unzipped the manually..)
-File dialog now ensures that the proper extension is used (will not allow to save without it)
-Fixed bug that made collision exceptions not work in 2D

demos/misc/instancing/engine.cfg

@@ -0,0 +1,8 @@
+[application]
+
+name="Scene Instancing Demo"
+main_scene="res://container.scn"
+
+[physics_2d]
+
+default_gravity=300