Improve geographic reporting

[Mike-Heneghan]

From the feedback it would be useful to do the following:

• Add support for the --verbose 1 flag.
• Add category breakdown for every region in data set.
• Ensure it is clear which dataset the report is being generated for.

[Mike-Heneghan]

From checking another management command which supports the verbose flag --verbose 1 that all methods need to include self to be able to use self.verbose.

Updated all method definitions and invocations to include self where appropriate.

[Mike-Heneghan]

Realised that the way the service_area_by_region_top_category_count method was written required calling services_in_service_area_regions every time a region report was required and only using a fraction of the data set.

This would not be performant as services_in_service_area_regions is very time consuming and demanding.

Wrote a method which calls services_in_service_area_regions once, prints the appropriate data and then uses the results for service_area_by_region_top_category_count.

[Mike-Heneghan]

Added further print statements for improving clarity.