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/Build.h

@@ -34,10 +34,8 @@
 #define EXPP_BUILD_H
 
 #include <Python.h>
-#include <DNA_effect_types.h>
 #include "Effect.h"
 
-
 extern PyTypeObject Build_Type;
 
 #define BPy_Build_Check(v) ((v)->ob_type==&Build_Type)