Drop support for python 3.1.

for building py3.2 on *nix see:
  http://wiki.blender.org/index.php?title=Dev:2.5/Doc/Building_Blender/Linux/Troubleshooting#Python

also fixed possible buffer overrun with getting the fake filepath for a blender textblock.

source/gameengine/GameLogic/SCA_PythonController.cpp

@@ -415,11 +415,7 @@ void SCA_PythonController::Trigger(SCA_LogicManager* logicmgr)
 
 		excdict= PyDict_Copy(m_pythondictionary);
 
-#if PY_VERSION_HEX >=  0x03020000
 		resultobj = PyEval_EvalCode((PyObject *)m_bytecode, excdict, excdict);
-#else
-		resultobj = PyEval_EvalCode((PyCodeObject *)m_bytecode, excdict, excdict);
-#endif
 
 		/* PyRun_SimpleString(m_scriptText.Ptr()); */
 		break;