wikiheaders: Updated to latest, cleaned up category documentation a little.

This documentation needs a LOT of work--maybe someday--but it's definitely not
_broken_ right now, which is good enough for now.

include/SDL_gamecontroller.h

@@ -19,14 +19,14 @@
   3. This notice may not be removed or altered from any source distribution.
 */
 
-/**
- *  \file SDL_gamecontroller.h
- *
- *  Include file for SDL game controller event handling
- */
-
 /* WIKI CATEGORY: GameController */
 
+/**
+ * # CategoryGameController
+ *
+ * Include file for SDL game controller event handling
+ */
+
 #ifndef SDL_gamecontroller_h_
 #define SDL_gamecontroller_h_