Fixed code for Firefox compatibility

-HP bars now refresh at the start of the battle.
-Added the first 2 NPCs to appear randomly.
-Added flavor text to fights.
-Known bug: It says battle was won even if you lose.
-Known bug: You loot stuff even if you loot.
-Known bug: It says you earn xp even if you lose.
Merge branch 'master' of https://github.com/anthonyappcard/multiverseminer

Conflicts:
	src/game/fight.js