Minor speedups for the BGE

* Where possible use vec.setValue(x,y,z) to assign values to a vector instead of vec= MT_Vector3(x,y,z), for MT_Point and MT_Matrix types too.
* Comparing TexVerts was creating 10 MT_Vector types - instead compare as floats.
* Added SG_Spatial::SetWorldFromLocalTransform() since the local transform is use for world transform in some cases.
* removed some unneeded vars from UpdateChildCoordinates functions 
* Py API - Mouse, Ray, Radar sensors - use PyObjectFrom(vec) rather then filling the lists in each function. Use METH_NOARGS for get*() functions.

source/blender/python/api2_2x/Mathutils.c

@@ -350,7 +350,7 @@ PyObject *quat_rotation(PyObject *arg1, PyObject *arg2)
 PyObject *M_Mathutils_Rand(PyObject * self, PyObject * args)
 {
 	float high, low, range;
-	double rand;
+	double drand;
 	//initializers
 	high = 1.0;
 	low = 0.0;
@@ -364,14 +364,14 @@ PyObject *M_Mathutils_Rand(PyObject * self, PyObject * args)
 			"Mathutils.Rand(): high value should be larger than low value\n"));
 
 	//get the random number 0 - 1
-	rand = BLI_drand();
+	drand = BLI_drand();
 
 	//set it to range
 	range = high - low;
-	rand = rand * range;
-	rand = rand + low;
+	drand = drand * range;
+	drand = drand + low;
 
-	return PyFloat_FromDouble(rand);
+	return PyFloat_FromDouble(drand);
 }
 //----------------------------------VECTOR FUNCTIONS---------------------
 //----------------------------------Mathutils.Vector() ------------------