More work on npc_abilities_custom

Trying to get special ability to work for frozen aura. It turns out that
if it's an ability it has to be skilled to a certain level for special
value to pull numbers.

Also added freezetag arrow basic, will work on more intricate soon.
Needs sounds
Moved abilitys for testing
Initial push for freezetag.pcf

Right now this contains a few unneccassary effects, but they will be
removed soon.

freezetag_arrows particles are contained in here.