Fixed the DivineAura crash.

Fixed a crash in NPC::Death.

Added more fixed length invis/camo spells to the effect handle. Reverted the chance to the invis fail formula as the current one is too high.
Merge pull request #127 from regneq/master

removed more unused code.
Player sold stackable items will show with a 1 again.
Fixed swimming skillups.

Further player position update tweaks.

Slight tweak to invis logic to avoid double messages on fixed length spells.
Merge pull request #44 from cavedude00/master

merge