Spellcraft fix

Makes spellcraft:
Only work on spells.
Actually use the spellpower bonus it says it does.

Allow negative powers

Allows negative combat_spellpower and family to bring you below your basic stat level for powers.
Needed because currently EFF_INTIMIDATED does nothing the majority of the time, since most enemies don't have anything boosting powers above the stat level.

Add shield speed

Adds a 'shield' speed type, so 'quick' weapons will no longer make shield pummel faster.
Also makes room for a possible quick-acting shield ego/artifact.

Speed fix for edge

Edge was having trouble merging some PM talents in.

Randart randboss updates

Fixed several bugs with randart and randboss generation.
Randbosses will not be created with duplicate or incompatible classes.
The Last Hope merchant should no longer create inappropriate randarts for the player.
NPCs with spells should no longer be spawned with inappropriate equipment (no more arcane disruption).
Added support for more random Fixed artifacts.
Not all antimagic actors are Zigur followers.

generateRandart parameters work correctly, and new parameters have been added.
game.state:addRandartProperties(o, data) function added to allow random properties to objects.
new resolver to calculate NPC ai_tactic based on talents known. (still in development)

deleted/disabled debugging code.
Simple check for basic equipment resolver

Pyromancer fix

Makes the Pyromancer/Cryomancer acheivements count damage even if the damage results in a kill.
Also makes damage to self not count.

Descriptions

More typo fixes and improved wild/primal infusion description so its clearer

Conflicts:
	game/modules/tome/data/talents.lua

NOTE: if any volunteer wants to convert the rest of the code, please do so!

Talent speed

- Adds the optional 'speed' field to talents, which will change how much energy they use.
- Adds the optional 'display_speed' field to talents, which will change what is displayed under 'Usage Speed' in the talent description.
- The default 'Usage Speed' line in the talent description displays the speed type and the % of a turn it will use, accounting for the actor's current speed bonuses. (eg. "Usage Speed: Spell (100% of a turn)", or "Usage Speed: Weapon (90% of a turn)" with a 'quick' weapon.)
- Changed a few talents that don't use any speed to use one. (Dirty Fighting, Ambush tree)