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/charRGBA.h

@@ -34,9 +34,6 @@
 #define EXPP_charRGBA_H
 
 #include <Python.h>
-#include <stdio.h>
-
-#include "gen_utils.h"
 
 /* Objects of <type 'charRGBA'> are used inside other Blender Python
  * objects, so this header file must contain only 'public' declarations */
@@ -45,7 +42,8 @@
 /* Python BPy_charRGBA structure definition: */
 
 typedef struct {
-	PyObject_HEAD char *rgba[4];	/* array of four pointers to chars */
+	PyObject_HEAD 
+	char *rgba[4];	/* array of four pointers to chars */
 
 } BPy_charRGBA;