Thick Cyan lines on edges on export - import mesh? When i enter Edit mode with my object i have thick cyan lines on every edge. I made my model with blender and the exported it to .obj without saving cause i wanted to import it in another project. Then when i entered edit mode in the project where i imported it there are cyan lines on every edges of the mesh. Here's a print screen of what's happening. 



What are those? And how to get rid of them?

Thank you.

EDIT: 

Ok, i tried random Things, and apparently is some "Sharp" stuff. So if you go in CTRL+E and select "Clear Sharp" it should disapear.
Those line represents the "Make sharp", there seems to be a bug that create those make sharp edges when exporting meshes. To remove them go to edit mode, edge selection mode. Hit A to select all edges. Then Hit Ctrl + E and select "Clear sharp" from the drop down list.