Adding an optimized recursive solution to the grid search problem.
further optimizations were restricted for the sake of readability.
Set up recursive tour solution for submission.
Initial addition of threaded grid tour solution.
Fixed descriptions.
Converted threaded tour to skip using globals where possible.
Updates to the optimized recursive tour solution.
Added memory allocation validation and threading constants to threaded touring solution.
Added simple Makefile for touring solutions.
Renamed tour_rec_opt to tour_rec
Consolidated code in threaded grid tour
Removed bitwise stuff from recursive solution.
Final fixes for touring problems.
Final updates to threaded tour.