Added new data: water levels of the great lakes.  The catalog has been changed accordingly, and a new water_levels.xml has been created.  The page* files and the report.pdf are not needed to be committed as they are created and changed by the scraper.  If they are deleted, the scraper will regenerate them as needed.  Alternatively, the scraper could be run with the command -clean to have these files removed after the scraper runs.
GLC water use (from january)