Merge pull request #36 from petersohn/master

Some minor modifications
Merge pull request #37 from petersohn/master

Factored out random track generator algorithm
Implemeted recurrence in the neural network
Removed debug printout
Output now doesn't flood the terminal
Multiline output, without flooding.

^C still needs some work
Made the thread parameter automatically use all cores by default
Revert "Multiline output, without flooding."

This reverts commit e287fd6e18d9cffb7aa30db012ffd70eeb7ae7a8.

This doesn't work very well with ^C yet
Added --use-recurrence parameter
Merge remote-tracking branch 'upstream/master'