bump to 0.5.0 for release
note 0.5.0 publication date in changelog
bump to next dev version
add a use_file parameter to util.open_file_for_url that be used to bypass downloading a file
add preliminary support for NCDC's CIRS dataset
add test case for earliest data - 1895
speed up CIRS tests by using dataframes without converting to dicts
add tests for ncdc CIRS by-state/region datasets
parse ncdc state/region datasets
add full list of regions for location name conversions
add a location_names kwarg that allows specifying which type (if any) of location names to use
add docstrings for CIRS module and get_data
fix cirs docstrings
fix cirs.get_data docstring index parameter formatting
add ncdc.cirs to API docs
fix test_utils.use_test_files() - it's truthiness was inverted
use a static test file for by_state tmp tests
update test values - they've changed slightly
clean up docstring
update changelog and README to include CIRS dataset