add docopt==0.6.2 to requirements so I can make friendlier CLIs
add better documentation around html_to_csv cli
save the THECB data as csv so the importers are more standard
begin making the THECB importer resemble the IPEDS importer
change thecb importer to resemble ipeds importer
update and fixes for importing graduation rates
Get the importer to handle 4yr institution graduation rates
update importer to handle community college graduation rates