Exit functionality via game engine, because sys.exit was making a mess

src/McRFPy_API.cpp

@@ -34,7 +34,7 @@ static PyMethodDef mcrfpyMethods[] = {
 
     {"setTimer", McRFPy_API::_setTimer, METH_VARARGS, "setTimer(name:str, callable:object, interval:int) - callable will be called with args (runtime:float) every `interval` milliseconds"},
     {"delTimer", McRFPy_API::_delTimer, METH_VARARGS, "delTimer(name:str) - stop calling the timer labelled with `name`"},
-
+    {"exit", McRFPy_API::_exit, METH_VARARGS, "exit() - close down the game engine"},
     {NULL, NULL, 0, NULL}
 };
 
@@ -471,3 +471,9 @@ PyObject* McRFPy_API::_delTimer(PyObject* self, PyObject* args) {
     Py_INCREF(Py_None);
     return Py_None;
 }
+
+PyObject* McRFPy_API::_exit(PyObject* self, PyObject* args) {
+    game->quit();
+    Py_INCREF(Py_None);
+    return Py_None;
+}

src/McRFPy_API.h

@@ -79,6 +79,8 @@ public:
     static PyObject* _setTimer(PyObject*, PyObject*);
     static PyObject* _delTimer(PyObject*, PyObject*);
 
+    static PyObject* _exit(PyObject*, PyObject*);
+
     // accept keyboard input from scene
     static sf::Vector2i cursor_position;
     static void player_input(int, int);