Need this to support workflows in #5. Gage data comes with lat/lon - we'll pull it for the gage into the object when we first request data, then use nhdR (maybe?) to get the COMID for the gage.
This is almost done, but the documentation needs work still.
[ ] gage documentation needs to be handled properly - moving all method comments to proper object documentaton
[ ] Examples in README and main package documentation need to show how to use the gage code to get the COMID and feed it through the rest - probably worth figuring out what the shortcut functions are going to be before doing this so that can document the shortcuts with the more flexible parts.
Need this to support workflows in #5. Gage data comes with lat/lon - we'll pull it for the gage into the object when we first request data, then use nhdR (maybe?) to get the COMID for the gage.