test for get_var on unset table
test for get_var on unset table

https://github.com/scraperwiki/scraperwiki_local/issues/7

hudsonkeithl/scraperwiki-python,scraperwiki/scraperwiki-python,tlevine/scraperwiki-python,openaustralia/scraperwiki-python,scraperwiki/scraperwiki-python,tlevine/scraperwiki-python,hudsonkeithl/scraperwiki-python,openaustralia/scraperwiki-python