Changed all modifiers to be ranges. A single number is now treated as a range of...

Changed all modifiers to be ranges. A single number is now treated as a range of n-n, so the random number in the range will always be the same, resulting in a single integer. This unifies potions and weapons/armor into the same modifier functionality

git-svn-id: https://svn.code.sf.net/p/gameservirc/code/trunk@526 bc333340-6410-0410-a689-9d09f3c113fa