Implemented example of Effect (BurnEffect), refactored ModelConstants to use properties files
Merge branch 'fightingteam' of https://github.com/duke-compsci308-spring2013/vooga into fightingteam
NEW: Added example effect BurnEffect and tweaked Effect handling slightly, removed remnants of visitor collision framework, standardized some constants in ModelConstants, fixed AttackObject creation in CharacterObject to properly add AttackObjects to the Mode, added instance id implementation to GameObject and implemented GameObject hashcode() and equals() using instance id
Merged previous commit with master, main changes are added instanceid and equals implementation in GameObject, added example effect BurnEffect, fixed AttackObjects not being added to Mode properly