Added 2 more screw and nuts

added screw and nuts to the y nut holder and fixed a hight error for the
pcb holder screws
Position render fix and little code cleanup
Made work bed semi transparent
Update to the base template
Added support for an alternitive z-carriage
Revert "Added support for an alternitive z-carriage"

This reverts commit 0e71ad30f3fd308029976cd0b269681b77342386.
Merge pull request #1 from D-Byte/v2.1

V2.1