Merge pull request #9 from glenchung/master

Latest assembly renders
Updated Glen's renders
Z End_stop_holder based on carlosgs' design https://groups.google.com/group/cyclone-pcb-factory/attach/5908b82adf4b38ca/Cyclone_Back_2013-10-19%2011.50.47.jpg?part=5&authuser=0
fix X End_Stop_Holder and re-position both PCB_vise_1s to accomandate X travel reduced by X  End_Stop_Holder
update renders