J-Head Bowden Delta Printer (bowden support, all metal) with microswitch

this is my change with support for microswitchs like http://hacker.instanet.net/Store/micro-switch-right-angle-p-42.html
or http://hacker.instanet.net/Store/micro-switch-extended-button-p-44.html

I took some microswitch from a toy remote control that was broken.