1) Add more output to data that don't pass the filter:  total people served,
   agency type, and a flag field (for future use).
2) Change the format of the date output so it's Excel-friendly.
3) Add header to output.
Change SimilarFilter so that we print out entries outside of the OUTPUT range
to give context to entries that trip the filter within the OUTPUT range.  Data
with the flag 'c' are such contextual values and data with the flag 'r' are
values that are in the given OUTPUT range.