Tub viewer improvements (#142)

* --tub is now optional for train subcommand. It also takes comma-separated format

* new train docopt parameters

* ... causes wierd behavior in docopt

* Dynamatically generates clips based on timestamps so that it's always up to date

* Change POST to using dynamic clip recognition

* remove animation from steering progress bar to reveal jitterness of steering angles

* car.py -> manage.py. Ghost rebase commits keep coming back