Added Eezo (No Recipes Call For It Yet!)

Eezo is ready. Rarity is equivalent to that of Diamond. Rare but not
oober rare.
Biotic power icon change, for better themes

What did I just say?
Iridium & Palladium for Guns & Armor

Platinum, Iridium, Palladium, and Element Zero are the four relevant
resources in ME.
Added Iridium and Palladium for crafting guns and armors like in ME.
Platinum is already in SB.
Iridium is Common (equivalent silver)
Palladium is Uncommon (equivalent to platinum)
Merge branch 'master' of https://github.com/Pfhoenix/Starbound-Mass-Effect-Edition
Merge branch 'tohklidan'