Allow test file in example to be specified as an argument
Allow test file in example to be specified as an argument

So users don't necessarily have to clone the whole repo
so paths work out.

[ci skip]

waddell/pandana,SANDAG/pandana,SANDAG/pandana,SANDAG/pandana,rafapereirabr/pandana,rafapereirabr/pandana,synthicity/pandana,waddell/pandana,osPlanning/pandana,waddell/pandana,SANDAG/pandana,UDST/pandana,osPlanning/pandana,osPlanning/pandana,UDST/pandana,synthicity/pandana,UDST/pandana,waddell/pandana,synthicity/pandana,rafapereirabr/pandana,rafapereirabr/pandana,synthicity/pandana,osPlanning/pandana,UDST/pandana