Fix for ticket 135.

Fix for ticket 135.

* Add additional druid "self" buffs that increase damage done.

* Add Mastery() and LastSpellMastery(id) script conditions

* Track the mastery information at the time a spell is cast.

* Add a SpellData(id key) script condition that takes two parameters, a
  spell ID and a key, and returns the data associated with that key from
  the SpellInfo() for that spell ID.

  SpellInfo()/SpellData() can be used together to stash and retrieve extra
  spell information that may be referenced within the script.

* Get the damage multiplier using OvaleAura:GetDamageMultiplier(spellId),
  which factors in the multipliers for the presence of the buffs and
  debuffs in the given spell's damageAura table (from OvaleData).

* Add new script statements SpellDamageBuff() and SpellDamageDebuff(),
  which take a spellId followed by a list of aura1=x1, aura2=x2, etc.,
  where auraN is the aura spell ID and xN is the damage multiplier if
  auraN is present.

git-svn-id: svn://svn.curseforge.net/wow/ovale/mainline/trunk@524 d5049fe3-3747-40f7-a4b5-f36d6801af5f