Blood: fix unused zombie state

Blood: fix FX sprite flipping

Blood: Fix hitscan weapons not working while floating over water (#931)

Blood: Restore health of enemies on load game

Blood: Enable joystick by default (#927)

Custom Dude System: Add ability to fly.

Custom Dude System: Add new weapon types.
Custom Dude System: Add many new parameters.
Custom Dude System: Optimize loading times using template sprites.
kModernDudeCustom:  Set aimHeight to 0.

Merge remote-tracking branch 'eduke32/master'

Blood: Adjust pitch clamp to 1000

Blood: fix gargoyle statue recoil state

Blood: previous player message fix was incorrect