* rewrote all uses of timerSetCallback. Most were unnecessary or long obsolete, the sound updates need to run per frame, not per tic and the UI tickers need to be handled in the main loop anyway.
* Use a more precise timer to animate the menu transition.
* uncouple other menu animations from the game timer.
Note: enet uses 'malloc' and 'free' as field names in a struct - this does not work with any compiler using some sort of heap instrumentation that #defines these names!
This had to be changed to allow MSVC debug builds to compile again.
It doesn't help when it turns out the compiler is broken and implementing std::chrono::high_resolution_clock as something that only counts in ms instead of properly aliasing it to std::chrono::steady_clock!
git-svn-id: https://svn.eduke32.com/eduke32@8002 1a8010ca-5511-0410-912e-c29ae57300e0
# Conflicts:
# source/build/src/sdlayer.cpp
