3D Physics Rework, Other Stuff

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

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.

modules/gdscript/gd_parser.h

@@ -183,6 +183,7 @@ public:
 			//call/constructor operator
 			OP_CALL,
 			OP_PARENT_CALL,
+			OP_YIELD,
 			OP_EXTENDS,
 			//indexing operator
 			OP_INDEX,
@@ -225,7 +226,7 @@ public:
 			OP_ASSIGN_BIT_XOR,
 			OP_BIT_AND,
 			OP_BIT_OR,
-			OP_BIT_XOR
+			OP_BIT_XOR,
 		};
 
 		Operator op;
@@ -258,6 +259,7 @@ public:
 		Node* condition;
 		AssertNode() { type=TYPE_ASSERT; }
 	};
+
 	struct NewLineNode : public Node {
 		int line;
 		NewLineNode() { type=TYPE_NEWLINE; }