Integrate qt-multi-screen-compositor/add-message-server-client

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Commit: seco-ne/tools/qt-multi-screen-compositor@bb90d170

Cleanup: Add common header for client and server, remove unused code

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Commit: seco-ne/tools/qt-multi-screen-compositor@9c3b785e

Config: Move the read rotation function inside the config class

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Commit: seco-ne/tools/qt-multi-screen-compositor@3bc95fd9

Add compositor-message tool, massiv renaming and cleanup

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Commit: seco-ne/tools/qt-multi-screen-compositor@00617781

Add server class, implement command decoding

Add hide and show window
MoveWindowToScreen