.travis.yml: use vocabs.loader for core vocabs.
.travis.yml: use vocabs.loader for core vocabs.

tgunr/factor,factor/factor,bpollack/factor,bpollack/factor,bpollack/factor,mrjbq7/factor,tgunr/factor,tgunr/factor,bpollack/factor,factor/factor,tgunr/factor,mrjbq7/factor,factor/factor,factor/factor,bpollack/factor,mrjbq7/factor,tgunr/factor,bpollack/factor,factor/factor,bpollack/factor,mrjbq7/factor,mrjbq7/factor,mrjbq7/factor,tgunr/factor,factor/factor