Adjustable laser mount for Trinus

The original laser attachment that the Trinus comes with is way too off for proper homing at the edge of the build area. This mount allows a sideways movement to adjust the homing easily as needed. Works great with [svgTrinusifier](http://vandenmar.com/svgtrinusifier-v2/)!

Depending on the layer adhesion of the filament and settings you use, I suggest being careful about how much you tighten the knobs. Overtightening could snap the whole mount part off. Might be a good idea to drill a hole in the middle of the printed screw bodies and put an M3 metallic screw through as a means of support.