change ratio to prob when choosing percent reinforcement, add EndBlock as exception
run experiments from single command line script
Merge pull request #67 from gentnerlab/MargotDev

change ratio to prob when choosing percent reinforcement, add EndBlock a...
Merge pull request #68 from gentnerlab/run-exp

run experiments from single command line script
Merge pull request #72 from gentnerlab/dev

adding EndBlock and pyoperantrun.py features