Egg Painter

This is a remix of the egg painter of mdietz. I tried to print one for my children, but the rods were too lose and I couldn't get springs of the right size, so I did a little modification to get it work better for me:

- Separated into two scad/stl files
- Reduced rod inner hole size to make smaller screws fit
- Changed end piece to have egg holder separated from spring
- Increased rod diameter to get tighter fit with holder