Use autoloaded_tests path instead of tests
Add MRI 2.1.2 to CI

Yeeeeessss I know I'm fucking failing CI right now -.-

I did this stupid thing where all the gems depend on each other, so
can't udpate any one without updating them all. Stupid idea, I'll go try
to fix that now.
Use autoloaded_strategies path instead of autoloaded_tests
Pull MBF dep from github travis so Travis can run