Implement patch for mimic message. [1754]
Prevent traps from being created on glyphs. [1790]
Make all nether breathers explicitly resist nether. [1791]
Add identify check for items.
Add identify check for spells.
Update browse prompt with ? toggle.
Fix pluralization of item and monster lists.
Tidy up some format lines.
Merge pull request #276 from bensemmler/fixes

Merge a bunch more fixes from Ben: 589, 1754, 1790, 1791, and a bit of 1611.
Remove nether breath giving nether resistance for monsters; follow up close of #1791.