Updates in Build 1833

- added a brightness slider

- added option to use mouse wheel for zoom
- added option to toggle crouching
- added legacy sprint setting in misc (don't hold gun sideways while running)
- fix  for the large red slugs sounds
- fix for the occasional camera tilt bug after getting up
- various fixes to make adding custom maps easier

(old versions of the .exe can be found in Patches.zip)