Modify .travis.yml
Modify .travis.yml

Remove nosetest since we may be switching to py.test.

Add django test runner.

Note that the notebook is not currently being run, but this will be
dealt with when we choose a testing framework.

openworm/ChannelWorm,gsarma/ChannelWorm,gsarma/ChannelWorm,openworm/ChannelWorm,VahidGh/ChannelWorm,VahidGh/ChannelWorm,cheelee/ChannelWorm,gsarma/ChannelWorm,cheelee/ChannelWorm,gsarma/ChannelWorm,cheelee/ChannelWorm,VahidGh/ChannelWorm,openworm/ChannelWorm,VahidGh/ChannelWorm,cheelee/ChannelWorm,openworm/ChannelWorm