Added the top directory named mediachanger

mediachanger/AcsDismountTape.proto

mediachanger/AcsForceDismountTape.proto

mediachanger/AcsLibrarySlot.cpp

mediachanger/AcsLibrarySlot.hpp

mediachanger/AcsLibrarySlotTest.cpp

mediachanger/AcsMountTapeReadOnly.proto

mediachanger/AcsMountTapeReadWrite.proto

mediachanger/AcsProxy.cpp

mediachanger/AcsProxy.hpp

mediachanger/AcsProxyDummy.cpp

mediachanger/AcsProxyDummy.hpp

mediachanger/AcsProxyZmq.cpp

mediachanger/AcsProxyZmq.hpp

mediachanger/CMakeLists.txt

mediachanger/CmdLine.cpp

mediachanger/CmdLine.hpp

mediachanger/CmdLineTool.cpp

mediachanger/CmdLineTool.hpp

mediachanger/CommonMarshal.cpp

mediachanger/CommonMarshal.hpp