git ignore and git attributes

Added default files from git for windows
Meshes of the festo gripper

the festo gripper open, closed and convex hull for the youbot
description
Festo Finger info

acknowledging the Mechanical department
Festo gripper cad files

In both Solid_Edge and Solid_Works formats, but the assemblies may need
the configuration files tweaked.
updated ms_lifecam_studio cad files

updated after first printing

now instead of two bevels one is combined with the armmount and the
other is larger. preventing the plastic from bending while it's still
hot during printing.