Ghost Context Refactor

https://developer.blender.org/D643
Separates graphics context creation from window code in Ghost so that they can vary separately.

source/gameengine/Ketsji/KX_PythonInit.cpp

@@ -30,7 +30,7 @@
  *  \ingroup ketsji
  */
 
-#include "GL/glew.h"
+#include "glew-mx.h"
 
 #ifdef _MSC_VER
 #  pragma warning (disable:4786)
@@ -1396,7 +1396,9 @@ static PyObject *gPySetVsync(PyObject *, PyObject *args)
 
 static PyObject *gPyGetVsync(PyObject *)
 {
-	return PyLong_FromLong(gp_Canvas->GetSwapInterval());
+	int interval = 0;
+	gp_Canvas->GetSwapInterval(interval);
+	return PyLong_FromLong(interval);
 }
 
 static PyObject *gPyShowFramerate(PyObject *, PyObject *args)