BGE Python API

Use 'const char *' rather then the C++ 'STR_String' type for the attribute identifier of python attributes.

Each attribute and method access from python was allocating and freeing the string.
A simple test with getting an attribute a loop shows this speeds up attribute lookups a bit over 2x.

source/gameengine/Expressions/ListValue.h

@@ -59,7 +59,7 @@ public:
 
 	bool CheckEqual(CValue* first,CValue* second);
 
-	virtual PyObject* _getattr(const STR_String& attr);
+	virtual PyObject* _getattr(const char *attr);
 
 	KX_PYMETHOD(CListValue,append);
 	KX_PYMETHOD(CListValue,reverse);