Added copper wire recipe and texture

Possibly temporary copper wire recipe added. Should work.
Only added so I would have something to work with for the texture for
the copper wire - insulated or uninsulated? - As you can see I went
uninsulated. You can add an insulated wire if you want, but you'd need
something to insulate the wire with. You could use wool, but eh...
Also I added a texture for it, in case you hadn't noticed.
It's not a great texture, but it'll work.