First batch of GE API cleanup.

The principle is to replace most get/set methods of logic bricks by direct property access. 
To make porting of game code easier, the properties have usually the same type and use than
the return values/parameters of the get/set methods. 
More details on http://wiki.blender.org/index.php/GameEngineDev/Python_API_Clean_Up

Old methods are still available but will produce deprecation warnings on the console: 

"<method> is deprecated, use the <property> property instead"

You can avoid these messages by turning on the "Ignore deprecation warnings" option in Game menu.

PyDoc is updated to include the new properties and display a deprecation warning
for the get/set methods that are being deprecated.

source/gameengine/GameLogic/SCA_PythonController.h

@@ -77,6 +77,7 @@ class SCA_PythonController : public SCA_IController
 	static PyObject* sPyAddActiveActuator(PyObject* self, 
 										  PyObject* args);
 	virtual PyObject* _getattr(const STR_String& attr);
+	virtual int _setattr(const STR_String& attr, PyObject *value);
 
 	KX_PYMETHOD_DOC_NOARGS(SCA_PythonController,GetSensors);
 	KX_PYMETHOD_DOC_NOARGS(SCA_PythonController,GetActuators);