First test build

First public test build for Windows. Built with MSVC 2017 (xp mode) so you will need the msvc 2017 runtimes from Microsoft download center if you do not have 2017 installed.

See commits for changes for time being.

in_mouse 1 is raw mouse.
Does not use SDL.
Loads of fixes and changes from Q3e upstream and ioquake3 and some from ETL as well.
WAV recording disabled.
WWWDownload code is untested if it still works properly
Vanilla mods should work if they don't do runtime memory patching etc.
Legacy mod partially works