First commit of the sudoko solver.
Committing the unit test directory for the sudoku solver. This directory
is very out of date and is not in sync with the project. It needs a lot
of work.
Finished JellyFishSolver and added a test jellyfish matrix.
Working on unique rectangles. Not finished.
Finished the unique rectangle solver. Like most of the solvers, there is
a lot of overlap between the different types (rule 1,2,3,4).