Deleted log files from repository.
A bit of clean up in inverted functions.
Simplified Node class in ISMesh.
Simplified Edge class in ISMesh.
Simplified the Face class in ISMesh.
Simplified the Tetrahedron class in ISMesh.
More clean up in simplex classes.
Deleted init, destroy and assignment operator functions from Simplex class.
More clean up in Simplex and its childrens classes (moved constructor, destructor functionality to parent class).
Removed util namespace around Simplex class.
More clean up in Simplex classes.
Key classes clean up.
Major clean up of Key and Simplex classes in is mesh.
Deleted unused code.
Replaced NULL_NODE, NULL_EDGE etc. with the is_valid check on the key.