NPC vs Client damage revamp

Shot list of things that changed:
AC Softcap is based on your defensive skill (the scaling factors
are based on at least previously stated dev quotes)
The over AC Softcap returns are now based on exact calculations
made with the Armor of Wisdom AA.
Shielding item bonus and Melee mitigation spell bonus (nerfs)
NPCs damage will now correctly follow the
"damage base + (damage interval * [1, 20])" formula.

These changes might seem a little weird but I didn't want to change
any of the other damage situations since they were fairly good, but
they still could use a revamp as well.

New rules:
RULE_BOOL ( Combat, OldACSoftcapRules, false) // use old softcaps
RULE_BOOL ( Combat, UseOldDamageIntervalRules, false) // use old damage formulas for everything
RULE_REAL ( Combat, WarACSoftcapReturn, 0.3448) // new AC returns
RULE_REAL ( Combat, ClrRngMnkBrdACSoftcapReturn, 0.3030)
RULE_REAL ( Combat, PalShdACSoftcapReturn, 0.3226)
RULE_REAL ( Combat, DruNecWizEncMagACSoftcapReturn, 0.2000)
RULE_REAL ( Combat, RogShmBstBerACSoftcapReturn, 0.2500)
RULE_REAL ( Combat, SoftcapFactor, 1.88)

If you want to use the old calculations only, set
Combat:OldACSoftcapRules and Combat:UseOldDamageIntervalRules to true
Merge branch 'master' of github.com:EQEmu/Server
(Performance) Corpse drag will now fetch entity by ID