BGE: Some various changes to make moving the character physics type easier:

* Undoing the previous applyMovement() changes for characters. This was causing bugs for the Motion Actuator.
  * Creating a Character Motion type for the Motion Actuator with specific controls for characters. This includes moving, rotating and jumping.
  * Adding a KX_CharacterWrapper.walkDirection to set the character's direction and speed.

Note, this also resolves the following bugs:
[#33585] "Setting dLoc of motion actuator [0,0,0] via python won't stop object" reported by Manuel Bellersen (urfoex)
[#33503] "Character physics type won´t accept more than one motion anymore" reported by Mr Larodos

doc/python_api/rst/bge.types.rst

@@ -3761,6 +3761,12 @@ Types
 
       :type: int
 
+   .. attribute:: walkDirection
+   
+      The speed and direction the character is traveling in using world coordinates. This should be used instead of applyMovement() to properly move the character.
+
+      :type: list [x, y, z]
+
    .. method:: jump()
 
       The character jumps based on it's jump speed.