Changes

On July 2nd of 2018, Chenyu Yang, the original code author of the above main project, requested me to have "an implementation of LP (linear programming) on GPU", and Ed seconded this idea. I henceforth started exploring the possibility of such an endeavor. What is more important, such "an implementation of LP on GPU" should beat our current solver (Gurobi or Matlab's linprog). After some research, my conclusion is that we cannot beat performance of Gurobi on solving a single LP, and we should continued to use Gurobi instead of linprog. However, we might be still able to speed up our code by task-parallelising on CPU cores.