Use Blizzard API to get the damage multiplier.

Use Blizzard API to get the damage multiplier.

The damage multiplier numbers aren't accurate from just scanning buffs
because the tooltips aren't accurate.  For example, Savage Roar's tooltip
says 30% increase but it's actually 40% increase, and the Fluidity buff in
the Jin'Rohk encounter says 40% increase but in LFR it's actually 96%
increase.

git-svn-id: svn://svn.curseforge.net/wow/ovale/mainline/trunk@961 d5049fe3-3747-40f7-a4b5-f36d6801af5f