Rotated sick_s300 mesh file

merge together with: https://github.com/ipa320/cob_common/pull/112
did you test this on the robot? 
I must say I'm not really sure what happens if you change it like this. 
Are the scans displayed correctly in rviz?

Additionally, this might conflict with several other nodes in navigation (e.g. amcl) that are actually written for 2D, i.e. they cannot account for roll. I think a saw a code snippet dealing with inverted scanners, but please test, to be sure.