Fix audaspace mess in 2.8

All these files were removed since accidental commit, revert and merge in 2.8.

ea31f0ac3b + 0a4e170c28 + 11f9a23a28 + 7b27b10fa6

extern/audaspace/bindings/python/PySource.h

@@ -0,0 +1,33 @@
+/*******************************************************************************
+* Copyright 2009-2015 Juan Francisco Crespo Galán
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*   http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+******************************************************************************/
+
+#pragma once
+
+#include <Python.h>
+#include "Audaspace.h"
+
+typedef void Reference_Source;
+
+typedef struct {
+	PyObject_HEAD
+		Reference_Source* source;
+} SourceP;
+
+extern AUD_API PyObject* Source_empty();
+extern AUD_API SourceP* checkSource(PyObject* source);
+
+bool initializeSource();
+void addSourceToModule(PyObject* module);