Define a constant for the default VARCHAR length.
Store post titles, and dedup posts.
Move templates/ into iron_blogger2/

Flask needs this to find the templates; apparently I haven't tried to
run the app since moving the module.
Add /planet page.

Really bare bones, and pretty awful -- doesn't even link to the actual
posts yet, let alone summaries. There are probably XSS vulnerabilities
too.
Add script to sync posts.