Fixed the iron sword, now it spawns in the chests (spawned as a perfectly generic item before)

What's new:
-4 bending arts from Avatar: The last airbender
-4 heads from earthbound
-3 weapons from darkest dungeon
-Samus' arm cannon from metroid
-Samus' helmet from metroid
-Mega Man's blaster
-Mega Man's helmet
-Gordon Freeman's head from half-life
-Shovel Knight's helmet

Minor changes:
-added the sfx to master sword's beam
-added glow and particles to master sword
-fixed an accident with the strings where vraxx's lance would not appear in the tables, oops