Identified Initiative Bug

DiceBag.java:
- Changed DiceBag.textFont to DiceBag.TEXT_FONT
- Changed DiceBag.inputExceptionString to DiceBag.INPUT_EXCEPTION_STRING

CombatTracker:
- Changed Creature.FORMAT to Creature.STRING_FORMAT
- Changed CombatTracker.textFont to CombatTracker.TEXT_FONT
- Changed CombatTracker.windowTitle to CombatTracker.WINDOW_TITLE
- Marked CombatTracker Initiative Order Bug When Killing Creature With
Higher Initiative #2 as TODO