Update Chinese simplified translation
Added slovak translation
Visual C++ Builds: Update Header "Installation"

This is taken directly from the 1.16 series, as it seems that the 1.x
development starts from here, so put this here first and make the
neccessary adjustments as we go on.
Clean up Visual Studio Build Files

-Combine entries in the property sheets and make it a bit more flexible,
 and drop some redundant items
-Use Custom Build Rules for generating enumeration and marshalling sources,
 and the .def file so that they can be wiped off when a "clean" is
 requested, and regenerate automatically when the templates/.symbols
 files are updated.
-Improve consistency by using ApiVersion rather than ClutterApiVersion
 with the Visual Studio project for other components of the Clutter/GTK+
 stack
-Get rid of unneeded configs in the "install" project
[l10n] Update Catalan translation
Added Aragonese translation
Updated Russian translation
wayland: Check for NULL surface on pointer leave events

In the protocol this is the expected behaviour when the client has
destroyed the surface.

https://bugzilla.gnome.org/show_bug.cgi?id=707377
Updated Latvian translation
Updated German translation
Updated Portuguese translation
Updated Danish translation
Initial Hungarian translation
actor: Correct setting the offscreen-redirect property

It's a flags property, not an enum one.

https://bugzilla.gnome.org/show_bug.cgi?id=708922
ClutterEvent: Mention _get_source_device() in docs

It's too easy getting bitten by the ->device red herring, thinking
that it's the original input device the event originated from.

https://bugzilla.gnome.org/show_bug.cgi?id=709620
Updated slovak translation
stage: implement touch event throttling

https://bugzilla.gnome.org/show_bug.cgi?id=709761