Fishy's Astromech Wolves

Properly implemented R5 units

Added nicknames/specific model numbers that give you specific droid skins no matter what wolf type.

Eg: "Arturito" or "Chopper" will give you R2 or chopper respectively

This was implemented bc R5-D4 would've required two accent colors, in stead of breaking my skin base formula, I decided to make him available through specifically naming any wolf "R5-D4" while keeping all the other color schemes still available with any other string that includes "R5"