Core/Spells: Adjusted aura definition.(330)

Core/Skills: changed calculation of the chance for gaining fishingskill points
DB: Corrected "56473" scriptname, and added go_temp flag crooections for tents.
Core/Pets: One more crashfix in pets
* And a crashfix for Glyph of Polymorph
Core/Quest: Fixed quest: 13890
Clean-up previous commit, it looked like hell.

Signed-off-by: Bootz <bootz@projectskyfire.org>
Core: Updated a few opcodes