Declare that Pinobot can be built with base 4.5 or 4.6.

The new Haskell Platform (2013.2.0.0) comes with GHC 7.6.3 which has base 4.6.
And Pinobot compiles fine with it.
Add 'stalker' to relevant flags.
Update UnNetHack and UnNetHackPlus monsters.