Header file clean up and warning fixes

- Mostly this cleans up the #includes and header files in the python project.
- Warning fixes are mostly casting issues and misc fixes. General warning clean up.
- #include Python.h MUST come as the first include to avoid the POSIX redefine warning in the unix makefiles
- fno-strict-aliasing flag added to makefile to fix a unavoidable type punning warning in types.c

source/blender/python/api2_2x/EXPP_interface.c

@@ -30,20 +30,12 @@
  * ***** END GPL/BL DUAL LICENSE BLOCK *****
 */
 
-#include <stdio.h>
-
 #include <Python.h>
 
-#include <BKE_global.h>
-#include <BKE_library.h>
-#include <BKE_main.h>
-#include <BLI_blenlib.h>
-#include <DNA_space_types.h> /* for FILE_MAXDIR, FILE_MAXFILE */
-
-#include "EXPP_interface.h"
+#include "EXPP_interface.h" 
+#include "BLI_blenlib.h"
+#include "DNA_space_types.h" /* for FILE_MAXDIR, FILE_MAXFILE */
 #include "Blender.h"
-#include "Registry.h"
-#include "gen_utils.h"
 
 extern char bprogname[]; /* argv[0] from creator.c */