glider scaling

[bsb808]

I suspect that there may be a problem with the glider mesh scaling.

Symptom:

Working on draft #246 and running this example to show gliders side-by-side.

roslaunch dave_robot_launch glider_collection.launch paused:=ture

Appears that either slocum glider is too large or hybrid glider is too small. Could we double check the scaling of these meshes and that the correspond to the actual physical dimensions of the robots?

[bsb808]

Addressed in commit fb373b9. Close when #246 is merged.