Avoid clicking link in hits feature

* Prior to removing the View Hits link, which will point to the
summary, update the all hits feature to go directly to the all hits page
Create a hits summary page

* Show top ten errors, archives and redirects on a single page
* Remove pagination from hits partial so it can be reused on the summary
Don't use pagination on summary aggregates

* Stop misusing pagination
Create filtered views of hits data

* New pages for errors, archives and redirects
* Move hits view into a partial for re-use across pages
Use hits over hits_data

* Stick with convention
* Avoid a potential clash with host.hits_data
Make hits assertions more readable/less repeat-y
Clean up the summary rendering
bootstrap_flavour_tabs had no need for a lambda
Include an "other" hits section

* Make it easier to spot if something is being missed by our most
common http status codes
* Most common example: 200
Optimise summary view queries:

* Use #limit instead of #take to limit at server-side
* Convert to arrays in controller to avoid view issuing count queries
* Group by path_hash rather than path in aggregate query
Save a DB call on "all hits" index
Remove timestamps from hits
Add "HTTP" to Status column header
Update copy to say paths, not hits

* We are showing a paginated list of unique paths, not hits
* A count of hits would be much higher
Merge pull request #49 from alphagov/traffic-summary

Create summary and filtered views of hits data [58805750]