Minor edits to item_catalog (removed unnecessary properties, added missing properties).
Minor tweak to assassin battle animation attack0 and attack1 frames.
Added potential animation code (currently disabled) to be hooked up later.
Current progress on battle animation screen effects based on weapon type. Added placeholder for start screen.
Merge pull request #39 from DrkSephy/master

Fixing up animations
Current progress on hooking up critical hit battle animations.
Merge branch 'master' of https://github.com/chessmasterhong/WaterEmblem

Conflicts:
	lib/game/entities/animations/enemy_assassin_battleanim.js
	lib/game/entities/animations/hero_battleanim.js
Reapplying changes to hero_battleanim.js before merge conflicts.
Adding Excalibur tome and battle animation