Merge pull request #1 from ymiyata/nn-simulated-annealing

Adds Simulated Annealing NN
Adds Display iteration to sa_opts in NN with Simulated Annealing
Merge pull request #2 from ymiyata/bugfix/nn-sa

Minor bug fix on Simulated Annealing NN
Updated README
Added hill climbing and TSP optimization
Merge remote-tracking branch 'upstream/master'