More performance improvements (avoiding alocating/dealocating small arrays).
Minor clean up in DSC class.
Added drawing of unmoved nodes (primarily for debugging) and drawing of edges is now only on the interface.
Bugfix in the drawing of lines. Moved the camera a bit closer to the object.
Improved drawing and print out statements.
Chose better mesh constants.
Improvement in flip function.
Minor safety improvements and clean up.
Added copy constructors and copy assignment operators to Simplex and SimplexSet classes.
Added an is_on_same_side function to utility (not used).
Updated the very simple test case.
Minor clean up.
Using a new, more safe, method for testing if the mesh contains any inverted tetrahedra.
Bugfix in SimplexSet class (could cause an LIBCPP_INLINE_VISIBILITY error).
Minor changes and improvements (especially to the is_flippable function).
Updated the flip test functions.