#12 Show page of all countries + fix total for all months

[Kevin Horton]

The current visitor stats page will show a list of countries and hits per country for any given month, but there is no way to get a list for all months. Suggest that the "Country" text in the table header be made clickable, and that it be linked to a page with all countries with number of hits.

Also, the total at the bottom of the table simply adds the number of countries in each month. However, most of the countries in any given month already exist in previous months, so the number of unique countries is much lower than this total would suggest.