WowAce

James D. Callahan III:
    - Added skill difficulty filtering - a minimum and maximum difficulty level can be set to display in the generated menu.
    - Moved DIFFICULTY_COLORS to the Constants section.
    - Moved EnchantLevels variable from do-block into IterEnchant().
    - After OnInitialize() is done, nil it out. Changed a couple of concats to string.format().
    - In Scan(): Only call common.CanPick() if the player is a Rogue.
    - Only define PICKABLE if it's nil when common.CanPick() is called.
    - Only define CAN_PROSPECT if it's nil when common.CanProspect() is called.
    - Only define MILLABLE if it's nil when common.CanMill() is called.
    - Only define CANNOT_DE if it's nil when common.CanDisenchant() is called.
    - Renamed EnchantLevels to ENCHANT_LEVELS.