BGE doc cleanup: Some small cleanups in the BGE docs:

* Fixing trailing whitespace in some files
  * Fixing some indentation
  * SCA_PythonController.owner is now documented
  * SCA_PythonKeyboard members now use the member directive instead of function

doc/python_api/rst/bge_types/bge.types.SCA_PythonController.rst

@@ -10,6 +10,12 @@ base class --- :class:`SCA_IController`
    A Python controller uses a Python script to activate it's actuators, 
    based on it's sensors.
 
+   .. attribute:: owner
+
+      The object the controller is attached to.
+
+      :type: :class:`KX_GameObject`
+
    .. attribute:: script
 
       The value of this variable depends on the execution methid.

doc/python_api/rst/bge_types/bge.types.SCA_PythonKeyboard.rst

@@ -22,13 +22,13 @@ base class --- :class:`PyObjectPlus`
       :type: dictionary {:ref:`keycode<keyboard-keys>`::ref:`status<input-status>`, ...}
 
 
-   .. function:: getClipboard()
+   .. method:: getClipboard()
 
       Gets the clipboard text.
 
       :rtype: string
 
-   .. function:: setClipboard(text)
+   .. method:: setClipboard(text)
 
       Sets the clipboard text.