Add View::Hits::Category#path_method
Make hits summary category titles clearly top ten

- #60347524
- Errors (and the like) are renamed to "Top 10 Errors"
- A link is added to each section to See more
- Hits summary link below summary table
Don't say "Top 10" when there are fewer
Merge pull request #64 from alphagov/summary-links

Make hits summary category titles clearly top ten