Removed unused ISMesh files.
Deleted code related to the unused undo functionality in ISMesh.
Clean up in is_mesh_lists_read and enclosed ISMesh class in is_mesh namespace.
Using #pragma once as include guard and removed OpenTissue namespace from is mesh.
Minor clean up in is mesh.
Removed more undo related code from is mesh.
More clean up in is mesh.
Yet more clean up in is mesh.
Removed simplex tags from is mesh.
Removed node simplex traits from is mesh.
Clean up in the t4mesh class. Mainly using auto and range based for loops.
Moved the cleaned typebinding traits to is_mesh file and deleted is_mesh_utils.h.