Essential:
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Show results on admin page
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.
Deal with the admin date fields
    Should the date fields be disabled, or should we cull invalid
    response times after changing event dates?
Consider redirecting from /create/do to admin

Cleanup:
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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:
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Allow updating metadata on admin page