Essential:
------------
Show response after submission
Make earliest and latest dates required for creation
Prevent blank event names and guest names
Consider some front-end, regex-based field validation
Authenticate admin page with admin code
    It might be sufficient to require that when getting the response summary.
Consider redirecting from /create/do to admin

Cleanup:
------------
Give response (and therefore response_time) a composite key
Get rid of the Stat call in NewStore.
    I can't remember the details. I think the old version
    of sqlitex was panicking if I failed to open a DB file.
    Maybe instead of statting, I would try to open an
    existing file, but instead create it on failure.
Add optional subtitles to (*front.handler).writePage
    Take a Page struct with title, subtitle, and contents.
Make titles optional in (*front.handler).writePage
Make the sqlite pool size configurable


More features:
---------------
Allow updating metadata on admin page