stage-cogl: Don't mess with the damage_history list when buffer_age is not available
Add 1.10 as a valid lcov version

https://bugzilla.gnome.org/show_bug.cgi?id=728177
master-clock: Clean up the over-budget diagnostic

Use the difference between the elapsed time and the available budget, so
that the message can be read more easily.
Release Clutter 1.18.2
Post-release version bump to 1.18.3
Updated Basque language
Visual Studio Builds: Avoid Implicit Linking to SDL

Cogl, when built with the SDL winsys, will include the SDL headers when
Cogl-based programs are built, which causes the SDL's wrapper for main()
to be used on Windows, causing an implicit requirement that all Cogl-based
apps must link to SDL2.lib and SDL2main.lib.  Avoid this behavior by
defining SDL_MAIN_HANDLED in the CFLAGS of the sample and interactive test
programs