Python: Add kore.app().

This method allows you to set a Python object and obtain it
by calling the method again without any arguments.

eg:

foo = SomeClass()

kore.app(foo)

foo = kore.app()

include/kore/python_methods.h

@@ -34,6 +34,7 @@ struct python_coro {
 
 TAILQ_HEAD(coro_list, python_coro);
 
+static PyObject		*python_kore_app(PyObject *, PyObject *);
 static PyObject		*python_kore_log(PyObject *, PyObject *);
 static PyObject		*python_kore_time(PyObject *, PyObject *);
 static PyObject		*python_kore_lock(PyObject *, PyObject *);
@@ -80,6 +81,7 @@ static PyObject		*python_websocket_broadcast(PyObject *, PyObject *);
 #define GETSET(n, g, s)		{ n, (getter)g, (setter)s, NULL, NULL }
 
 static struct PyMethodDef pykore_methods[] = {
+	METHOD("app", python_kore_app, METH_VARARGS),
 	METHOD("log", python_kore_log, METH_VARARGS),
 	METHOD("time", python_kore_time, METH_NOARGS),
 	METHOD("lock", python_kore_lock, METH_NOARGS),

src/python.c

@@ -266,6 +266,7 @@ static struct coro_list			coro_suspended;
 extern const char *__progname;
 
 static PyObject		*pickle = NULL;
+static PyObject		*kore_app = NULL;
 static PyObject		*pickle_dumps = NULL;
 static PyObject		*pickle_loads = NULL;
 static PyObject		*python_tracer = NULL;
@@ -1641,6 +1642,29 @@ python_kore_pgsql_register(PyObject *self, PyObject *args)
 }
 #endif
 
+static PyObject *
+python_kore_app(PyObject *self, PyObject *args)
+{
+	PyObject	*obj;
+
+	if (!PyArg_ParseTuple(args, "O", &obj)) {
+		PyErr_Clear();
+
+		if (kore_app == NULL)
+			Py_RETURN_NONE;
+
+		Py_INCREF(kore_app);
+		return (kore_app);
+	}
+
+	Py_XDECREF(kore_app);
+
+	kore_app = obj;
+	Py_INCREF(kore_app);
+
+	Py_RETURN_TRUE;
+}
+
 static PyObject *
 python_kore_log(PyObject *self, PyObject *args)
 {