Revert to old functional version

no more stuck weapons when climbing ladders

absolutely nothing has changed whatsoever

added more compatibility with certain weapon packs (be sure to report any double-holstering)

made backup holster animations work properly in mp (and works even better than before in sp)

Added fallback for weapons without holster animations (just plays the draw animation backwards at double speed lol)

hopefully got rid of some debug stuff and something unfinished

made SimpleHolster() a clientside global
ladders no longer holster if you're not actually climbing them (important for hl1/cs style ladders)

added a more consistent ladder check (reduces amount of holstering calls when walking over ladders)

added anti-laddercheese solution (it was very unintended)