3D Physics Rework, Other Stuff

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3D Physics:
-Fixed "Bounce" parameter in 3D
-Fixed bug affecting Area (sometims it would not detect properly)
-Vehicle Body has seen heavy work
-Added Query API for doing space queries in 3D. Needs some docs though.
-Added JOINTS! Adapted Bullet Joints: and created easy gizmos for setting them up:
   -PinJoint
   -HingeJoint (with motor)
   -SliderJoint
   -ConeTwistJoint
   -Generic6DOFJoint
-Added OBJECT PICKING! based on the new query API. Any physics object now (Area or Body) has the following signals and virtual functions:
    -input_event (mouse or multitouch input over the body)
    -mouse_enter (mouse entered the body area)
    -mouse_exit (mouse exited body area)
   For Area it needs to be activated manually, as it isn't by default (ray goes thru).

Other:

-Begun working on Windows 8 (RT) port. Compiles but does not work yet.
-Added TheoraPlayer library for improved to-texture and portable video support.
-Fixed a few bugs in the renderer, collada importer, collada exporter, etc.

drivers/unix/file_access_unix.cpp

@@ -64,7 +64,7 @@ Error FileAccessUnix::_open(const String& p_path, int p_mode_flags) {
 	f=NULL;
 
 	String path=fix_path(p_path);
-	//printf("opening %ls\n", path.c_str());
+	//printf("opening %ls, %i\n", path.c_str(), Memory::get_static_mem_usage());
 
 	ERR_FAIL_COND_V(f,ERR_ALREADY_IN_USE);
 	const char* mode_string;