Fix bug with reversed strictness of constraint
Add Makefile
Do not track tests executable
Improve Ivic tests with routines ratio01 and ratioI
Write and hide convexity tests for Ivic

Currently they fails. It is not a bug of our algorithm.
It shows that some values are better estimated by convexity,
taking lucky neighbouring points, than by pointwise calculations.
Rewrite initial pairs, use many intermediate points from the triangle