Added back Search, which was removed in master
Added feed generating. Rough draft.

The feed just grabs all possible files and generates a feed item for
them. After we cache the initial load of items, we can include feed
limiting / recent sorting / etc.
Added absolute urls
Added search results
The feed now uses snapshots only, as to shrink the response from tapir
Changed token for more testing
Added search form
Merge branch 'master' into search
Updated search template to new topnav usage.
Added plaintext to feed generation
Merge branch 'master' into search
Added tapir source so we can tweak it.
Changed query param to `q`
Set the query param via the setting, rather than modifying the source.
Limited the search result contents to the first 200 characters
Increased the summary limit
Added Search Results Styling