Changed Range to be a template class so it can be used with unsigned & signed ints...

Changed Range to be a template class so it can be used with unsigned & signed ints, and potentially char... I imagine that the class has to be castable to an integer
Changed GetMonstersByLevelId to GetMonsterIdsByLevelId and implemented an index table for mapping lists of monsters to their respective levels. This results in a much faster GetRandomMonsterForPlayer function in ForestGL... 10,000 gets in about 3 seconds
Added FightGL with functions for when players fight things

git-svn-id: https://svn.code.sf.net/p/gameservirc/code/trunk@539 bc333340-6410-0410-a689-9d09f3c113fa