start on usace.swtwc module for getting US army corps data
add unit tests for usace.swtwc
implement usace.swtwc.get_station_data
add docstrings for usace.swtwc.core methods
parse usace.swtwc date with util.convert_date()
respect modes when using gzip and tarfile context managers
docstring fix
add test file for usace.swtwc
add a usace.rivergages module for the army corps' rivergages website
unit test usace.rivergages.get_stations
add docstring for usace.swtwc.core
add docstring for usace.rivergages.core
rename rivergages test file
add usace.rivergages.get_station_parameters() function
add usace.rivergages.get_station_data() function