Add.  QUERY_VARIABLE_NAMES to store query string format names
FIX: remove print statement
Fix. removed `print` statement.
Mod. Ensure datetime bounds exist in the query string.  Resolve all bounds to day.  Allow specification of only "%Y%D%H" for datetimes.
Mod. Referenced named tuple storing query string names for key values.
Mod. Renamed strip_query_string() to process_request_params(). Docs and re-org of layout.
Mod. decoupled request processing logic from url query string.