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/Text.h

@@ -33,7 +33,8 @@
 #ifndef EXPP_TEXT_H
 #define EXPP_TEXT_H
 
-#include <DNA_text_types.h>
+#include <Python.h>
+#include "DNA_text_types.h"
 
 PyObject *Text_Init( void );
 PyObject *Text_CreatePyObject( Text * txt );