MoveIt:add a custom scene to moveit using own stl file

import stl into moveit

https://answers.ros.org/question/61094/import-stl-into-moveit/

binary STLs work fine, but SolidWorks places the string 'solid' in the STL header (first 80 bytes). 
Assimp doesn't like this, as it assumes headers with 'solid' in them are followed by ascii STLs. 
Replace the 'solid' string with 'dilos' for instance and everything should work.