Move modulse form Utils/ to Common/; they are not so general any more
Optimize Applicative instance of Frequency
Define dice frequency distribution, with a Num instance

Based on
    http://chplib.wordpress.com/2010/08/13/nice-dice-in-haskell
Define dice scaled with level depth with a Num instance
Replace the old Dice types with the new one
'Fix' the 'multiplication' of scaled dice
Fix calculating total dungeon depth, for scaling
Fix the Show instance of Dice
Make the nameFrequency field non-strict

because it's costly to produce, but rarely used.