Rounded Cable Chain

Yet another cable chain for 3d printers, cnc mills, laser cutters, robots ... and everything that needs electricity on moving parts.
My cable chain is heavily inspired by Landru's cable chain (http://www.thingiverse.com/thing:10915) and a remix of it (http://www.thingiverse.com/thing:10934). They should be compatible to my one as well.

What I changed:
- rounded shape on the outside (just because I like the look)
- multiple endings with different options to mount.
- open links are n