RepRapPro clip on spool holder spindle

I couldn't find any spool holders that clipped ontop of the RepRapPro properly, and fitted the spool i had also printed.

Have taken the clip off [thing:11447](http://www.thingiverse.com/thing:11447) scaled it down to fit a 10mm spool hole, and built a light weight arm that clips onto the top of the printer.

You can then clip a [thing:8317](http://www.thingiverse.com/thing:8317) based spool to it.