Qt 5.5 introduces some new features and improvements as well as bugfixes
over the 5.4 series. Better conformance with the QPA interface has been
achieved, and there has been a focus on making QtQuick work reliably in
Wayland Clients

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*                            Qt Wayland General                            *
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- Update Wayland protocol version to 1.4
- brcm integration fixed
- Added a class for converting shm formats

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*                          Qt Wayland QPA Plugin                           *
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- xdg-shell integration updated to work with weston 1.6
- Improve popup handling
- Added support for Qt WebEngine
- Added support for setMask for input region
- Fix for using QtQuick with the threaded renderer
- Fixed fontrendering to be on par with the xcb plugin


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*                              Qt Compositor                               *
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- Only use Q_SLOTS and Q_SIGNALS in header files
- Added a QWayland Output class
- Added support for multiple input devices
- Added public class for QWaylandClient