SceneMainLoop -> SceneTree

-=-=-=-=-=-=-=-=-=-=-=-=-=-

*YOUR SOURCE MIGHT NOT WORK*
For mor information on fix:
https://github.com/okamstudio/godot/wiki/devel_scene_tree

Other stuff:
-Shower of bullets demo
-Fixes all around

io_scene_dae/export_dae.py

@@ -185,7 +185,11 @@ class DaeExporter:
 
 		else:
 			#export relative, always, no one wants absolute paths.
-			imgpath = os.path.relpath(imgpath,os.path.dirname(self.path)).replace("\\","/") # export unix compatible always
+			try:
+				imgpath = os.path.relpath(imgpath,os.path.dirname(self.path)).replace("\\","/") # export unix compatible always
+			except:
+				pass #fails sometimes, not sure why
+
 
 
 		imgid = self.new_id("image")