Adapt GetAura() to store results in a table passed to the method.

Adapt GetAura() to store results in a table passed to the method.

This affects the GetAura method in OvaleAura, OvaleState and
OvaleCondition.

This change allows for efficient lookup of any of the properties of the
aura found by GetAura if needed, while preserving the base information in
the return values for GetAura (start, ending, count, gain).

git-svn-id: svn://svn.curseforge.net/wow/ovale/mainline/trunk@942 d5049fe3-3747-40f7-a4b5-f36d6801af5f