GitLab

These are derived from the git history, so some aren't exactly
right (e.g., modified dates from a commit where we just added/removed a
tag or something), but close enough and a good first pass.

The current setup doesn't like an empty tag field.

Not super happy with how the LESS files are organized, but they work for now.
Posts/Pages can have descriptions now that are used in the meta tag for the
page and for extra detail in post lists.