Invent own web microframework

(It's a horrible thing to do and I'll surely regret it.  Is there
anything lightweight already packaged for Ubuntu 10.04?)
Replace pure-Python rendering with a Mako template
Day page that lists all entries for a day
Add search
Suppress some flake8 warnings
Month page lists all entries for a month
Year page that lists all entries for a year
A page for the entire changelog
Pay attention to WSGI application prefix
Set up autoescaping to avoid HTML injection

Sadly python-markupsafe is not available in Ubuntu 10.04.
Highlight the target entry
Fix search boxes so they work on every page
Case-insensitive search
Remind me where to look for pbuilder results