#389 Ali's Cave rework

[DraugTheWhopper]

Some changes to Ali's Cave near Navar are included. Notably:

• No_spells area is expanded a little, and has a new floor to indicate something might be different.
• Unholy_ground area no longer covers the whole cave, instead only the same area as the no_spells.
• A little more treasure in the intermediate room
• Reworked entrance area to look nicer, and move exits to the edge of the map.
• Swapped positions of the rats and tigers, to scale difficulty correctly as you push further into the cave
  • This should help deter low-level characters without instantly killing them when they encounter tigers
• The djinn is now a vanilla major djinn, and no longer has special buffs.

[Kevin Zheng]

Committed in r22042, thanks!