[qtwayland] Do not send visibility notification on creation
[qtwayland] Add an extension for sending keys to specific windows.
Merge pull request #29 from mikkoharju/clientRendering

[qtwayland] Do not send visibility notification on creation
Merge pull request #30 from xknight/master

Ping/Pong API
Merge pull request #31 from adenexter/master

[qtwayland] Add an extension for sending keys to specific windows.
Compositor: expose processId as a property

This shouldn't change during the lifetime of the surface, so exposing it
as constant.