* This however, removes support for CMake earlier than 3.9
which isn't a big problem to me, as we also support Waf which supports
Python 2.7, so there is always an option for legacy systems
* Get VGUI back (optionally)
* Add some missing VGUI invocations
* Update CMakeLists.txt to build with vgui for Windows
* Move windows.h inclusions only to those places where it's really needed
* Try fix mingw build
* Update hud_spectator
* Merge nekonomicon's vgui branch
* Don't include vgui panel and app in cdll_int.cpp if vgui is real
* Deduplicate scoreboard global variables
* Add options to prefer non-vgui motd and scoreboard when vgui is enabled
* Add vgui-dev as a submodule. Add building vith vgui to CI
* Fix artifact uploading
* Don't use global variable when not necessary
* char* to const char* in CMenuHandler_StringCommand constructor
* Fix 'format string is not a literal string' warnings
* Fix 'always evaluate to true' warnings
* Team Fortress classes to const char*
* CreateCommandMenu accepts const char*
* Fix printf formats. Turn some unsigned longs into unsigned ints since they use only 32 bits anyway
* Explicit assignment result as condition
* Prevent memory leak on menu reading
* Localize button text
* Create FileInputStream on stack avoiding the leak
* Remove Servers Browser code
* Arrow file names to const char*
* Fix assignment to the wrong variable
