Alpha 1.0.34: Update langs.

Alpha 1.0.33: Fix build for Xcode.

Alpha 1.0.32: Fix round video checks in MediaView.

Alpha 1.0.31: Fix layout for message edit.

Alpha 1.0.30: New tabbed panel as a third column.

Version 1.0.29: Fix crash on app quit.

Some cleanup actions in App::clearHistories() queue file loader
destructions that should be completed before MTProto is reset.

Alpha 1.0.28: bump version.

Version 1.0.27: Fix launch in Ubuntu 17.04

Ubuntu 17.04 launch results in segfault if the build was done
by GCC 6.2 (works fine with GCC 4.9). Backtrace shows that it
crashes in gtk_init_check() call somewhere in libmirclient and
tests show that it works fine with GDK_BACKEND=x11.

So we use gdk_set_allowed_backends() method to explicitly state
that we support only "x11" GDK backend, that way it doesn't try
to use libmirclient and it does not crash.

Fix telegramdesktop#3176 telegramdesktop#3162

Version 1.0.26 for macOS: Fix Clang builds.

Custom build of libc++ for OS X 10.6-10.7 already has C++17 as_const.
Add workaround for Apple Clang has strange issues (freeze and segfault).

Alpha 1.0.25: Edit phone number in Settings.

Also fix build for GCC.
Also add scripts for GitHub releases management.