libtorc-qml: Add TorcQMLDisplay

- currently not plugged in.
libtorc-qml: Add TorcQMLDisplayOSX
libtorc-qml: Start using TorcQMLDisplay

- simplify TorcEDID and use it in TorcQMLDisplay
- add a TorcQMLDisplay object to TorcQMLEventProxy
- update TorcCECDevice to use the new display class and react
dynamically to physical address/display changes.