Install scipy before installing channelworm
Install scipy before installing channelworm

The .travis.yml script has been updated to do this, so we don't get a
failing build (hopefully).

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