Add whip
Merge pull request #7765 from kevingranade/fix-liquid-car-doors

Check for null string in addition to no string.
Merge remote-tracking branch 'CleverRaven/master' into FrankenMod
Merge branch 'master' of https://github.com/CleverRaven/Cataclysm-DDA into whipit
Whip now uses proper "generic_no_ammo"
Added "WHIP" ammo effect
Changed whip skill to melee, added melee to ranged time_to_fire
Whip now makes "Crack!" noise of 50
Fix NO_AMMO weapons displaying their no ammo when firing
NO_AMMO weapons no longer display ammo in menus
Merge remote-tracking branch 'TranquilMarmot/whipit' into FrankenMod