Fixed a Lua error that would occur if a round ended with no players actively participating

* gib_snortdortly, a new map once again by Tostykig
* The F4 menu has been revamped
* Killsounds, configurable in the new F4 menu
* Victory music, configurable in the new F4 menu
* New weapons: gravity gun and the desert eagle
* Spectator mode, press F1 to toggle
* The scoreboard now sorts by players by the amount of points they've gotten
* The toolgun has been reverted to use the same effects as everything else for consistency's sake
* Added a small gradient to the placement HUD
* Other various fixes

Fixed a pretty significant bug that made boosting inconsistent. This fix made boosting much more effective, and as a result the parameters on the boost have been lowered to compensate a little. Boosting should be a little more effective vertically now, relative to the horizontal push.

* Lower default run speed for the sake of helping close quarters shootouts flow better and encourage better boosting
* Map improvements to both shipped maps to alleviate the issue of some parts of the maps not seeing as much traffic (thank you again to Tostykig for making these improvements!)
* Fix warm up mode's timer not setting up properly

None Provided

Added a thumbnail for gib_scudgehole

* New map: gib_scudgehole. Thank you again to Tostykig for this!
* Sprinting is now the default. Hold shift to walk
* Some various fixes and refinements, mostly internal

Fix killicons but for real this time, oops.

Hopefully fix icons not appearing in the killfeed?