Fixed undo on Manhack spawner

Added 'Manhack Pack' group
Added 'Manhack Spawner' group
Added 'Rollermine Pack' group
Added 'Rollermine Spawner' group
Updated disposition settings for Vort slaves
Added health override CVar for Hunters
Added health override CVar for Manhacks

Added checkbox for citizen explosive resistance
Updated checkbox settings for weapon dropping
Fixed Civilian Spawner relationship settings

Added Vortigaunt Health CVar

Added Vortigaunt accuracy CVar
Added 'Slave Vortigaunt' group
Added 'Slave Vortigaunt Spawner' group
Fixed weapon drop CVar
Fixed long visibility CVar
Fixed push/give way CVar

Fixed some numbers related to drop weapon spawn flags
Added 'Long Vision' to the options menu
Added 'NPCs can pick up Weapons' to options menu
Added 'NPCs give way to player' to options menu
Added 'Strider' group
Removed deprecated spawn functions from all NPCs
Changed 'Civilians' expressions to scared
Changed all instances of 'ENT.AdminOnly' to 'ENT.AdminOnly'
Removed weapon drop flags from Antlions and other such NPCs
Removed unused CVars from certain NPCGs
Changed accuracy CVars named from 'npcg_*_accuracy' to 'npcg_accuracy_*'
Added Synth accuracy
Added City Scanner to CP Squad
Changed all 4-5 man groups to spawn in an X pattern

Fixed CP Fireteam
Moved 'Civilians' group to main groups tab
Minor code changes

Fixed rebels (again)
Rebel groups now spawn with random body types
Added 'Partisan' group
Added 'Partisan Spawner' group
Added 'Vortiguant Pack' group
Added 'Vortiguant Pack Spawner' group
Fixed proficiency of Hunter pack

Fixed Rebel groups

Changed Accuracy CVar to include settings for all 5 accuracy levels
Renamed Accuracy CVar for Combine from "npcg_combine_perfect_accuracy" to "npcg_combine_accuracy" to reflect the new level-of-accuracy CVar
Added Accuracy CVar for Rebels
Added Accuracy CVar for Civil Protection
Added CVar for Grenade count
Added CVar for Manhack count
Removed 'Police Squad (Manhacks)' group
Added 'CP Scout Group'
Added 'Combine Scout Group'
Fixed Rebel NPCs random expression key value command
Added CVars for health overrides - this may not work correctly, I'm working on same.
Added CVar for spawner wave timers - same as abouve, I'm debugging it.