Reinforced Glass Clamp for Prusa I3

New: Check my new alternate design for PEI plate here:
http://www.thingiverse.com/thing:1430661

Updated new file with a fixed mesh (done with MeshMixer), The file size increased due to the re-meshing but I it looks and loads good in Cura and Craftware, and resolved the gap issue reported in the comments. I tried Netfabb but could not get good results with that.

Updated V2 STL (11/30/1025)

1) Increased the length of the clamp bars - This helps to avoid the corner of glas