Merge lp://staging/~kdub/qtmir/nochange-rebuild into lp://staging/qtmir

Fix use of uninitialized variable
Approved by: Daniel d'Andrada, PS Jenkins bot

Enable Efficient String Construction by default

See http://blog.qt.io/blog/2011/06/13/string-concatenation-with-qstringbuilder/
Approved by: Gerry Boland, PS Jenkins bot

Build with clang (tests/gmock fails and is unfixable on our side i'd say)
Approved by: Gerry Boland

Use pid_t for PIDs.
Approved by: Daniel d'Andrada, PS Jenkins bot

Ensured Mir surface items with size less than or equal to zero are not rendered, as it's usually done for standard QtQuick items.
Approved by: Gerry Boland

Fix a crash when dropping a surface frame before Qt draws a surface item. Fixes: #1517139
Approved by: Gerry Boland

Releasing 0.4.6+16.04.20151119-0ubuntu1

Implemented support for cursors set by client surfaces
Approved by: Lukáš Tinkl

Manage frameSwapped signal/slot connection with MirSurface more strictly to avoid crash.

Direct Signal/slot connections across thread boundaries incur the same risks as any cross-thread calls. While connect/disconnect are thread safe methods, it is possible for a slot to be called while the slot owner is being deconstructed - and so not yet disconnected.

So watch for the Item's window change signal and disconnect signal immediately. Also move slot ownership to MirSurfaceItem to auto-disconnect more aggressively.
 Fixes: #1517571
Approved by: Daniel d'Andrada

Forward Mir mouse wheel events to the shell cursor Fixes: #1497091
Approved by: Lukáš Tinkl

Revert revision 415

The commit "Ensured Mir surface items with size less than or equal to zero are not rendered,
as it's usually done for standard QtQuick items." caused a regression.

MirSurface.size was being kept uninitialized, as QSize(-1,-1).

Releasing 0.4.6+16.04.20151125-0ubuntu1

Rebuild against Qt 5.5.1.

Politely asks processes to close before resorting to killing Fixes: #1434584
Approved by: Daniel d'Andrada

Add MirSurfaceItem.fillMode and ensure items and buffer are in sync

Ensure that by the time we enter the phase of updating the scene graph, all qml items are up to date regarding the size of the buffer about to be rendered.

NB: This rendering scheme needs triple buffering to work.
Approved by: Michael Zanetti

Make Session hold multiple surfaces

+ Standardize MirSurface debug messages and account for multiple surfaces per app
Approved by: Gerry Boland

Don't hold a wakelock on apps that are exempt from lifecycle management.

This supports the new exemptFromLifecycle flag for applications as well as bringing back the internal RunningInBackground state.

The tests were revived from the same branch that removed them when we removed RunningInBackground (revision 400) Fixes: #1518764

Releasing 0.4.7+16.04.20151210-0ubuntu1

compatibility branch for Mir 0.18
Approved by: Gerry Boland, Michał Sawicz

Releasing 0.4.7+16.04.20151217-0ubuntu1

No-change rebuild to get -gles in sync
Approved by: Kevin DuBois

Releasing 0.4.7+16.04.20151222-0ubuntu1

Update Session.fullscreen properties at the right time Fixes: #1525893
Approved by: Gerry Boland

Releasing 0.4.7+16.04.20160104-0ubuntu1

bump changelog for mir rebuild