Move ZlibDecompressor to libshared

* This will be used to implement compressed http streams
* Remove the custom BDataOutput class, and use BDataIO instead, for
easier integration with existing code.

headers/private/shared/ZlibCompressionBase.h

@@ -0,0 +1,23 @@
+/*
+ * Copyright 2009, Ingo Weinhold, [email protected].
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef _PRIVATE__ZLIB_COMPRESSION_BASE_H_
+#define _PRIVATE__ZLIB_COMPRESSION_BASE_H_
+
+
+#include <SupportDefs.h>
+
+
+namespace BPrivate {
+
+
+class ZlibCompressionBase {
+public:
+	static	status_t			TranslateZlibError(int error);
+};
+
+
+}	// namespace BPrivate
+
+#endif	// _PRIVATE__ZLIB_COMPRESSION_BASE_H_