Change Boots of Speed and Boots of Elvenkind to ensure that they are at
least +2 and +4 respectively.
(cherry picked from commit 5dbb5c1cf833c4092706298f23d46b771c11b0fb)
Fix polymorph crashing, and teak the probabilities a bit.

This change will make polymorphing a bit more likely to occur.
The previous algorithm could often generate very narrow acceptable
level ranges which might not have been satisfied. After this
the range of possible polymorphs should be a bit wider.
Merge pull request #228 from non/topic/fix-polymorph

Fix polymorph crashing, and teak the probabilities a bit.
Nerf GCV
Fix disarming display on character sheet.
Merge pull request #229 from fizzix/fizzix_merge

BoS fix and nerf GCV vault