[Development] Make Qt WebView a Qt Add-on

[Stromme Christian]

Hi,

The Qt WebView module has been a tech preview for 5.4 and is still going to be a tech preview for 5.5, but
for 5.6 we would like to propose that it gets upgraded to an official Qt add-on. Making the module an add-on,
and also making it part of the normal release infrastructure, should hopefully improve the current (manual)
release and testing process.

For those not familiar with Qt WebView, the modules goal is to provide a more lightweight WebView API for application
developers that don’t need to, or are unable to ship a whole web engine with their application.
Currently Qt WebView provides a Qml only API (a subset of the WebEngineView APIs) and has implementations for
Android, iOS and OS X. And besides Windows Phone/RT, which is still on the wish list, other desktop platforms should
already be supported through Qt WebEngine.


—
Christian Stromme