Yet another cable chain

This cable chain was designed from an idea (it was not based on any previous work) in DesignSpark to suit my steel Prusa i3 - it has a tighter radius than some which I thought a good thing. It has some end clips and I will add more as I develop them for my needs - I still have to do the X and Z axes.

Other parts designed for my printers include:
- http://www.thingiverse.com/thing:1959901 (GT2 belt clamp (Prusa Y-axis)
- http://www.thingiverse.com/thing:1937232 (Arduino Mega and RAMPS v1.4 c