Add WebsiteContent #48
Better yesod-gitrepo dev mode
/lts and /nightly routes are set up
Allow uploading LTS and nightly snapshots
Track whether an individual package has documentation #49
Package page per snapshot #36 #49

This is not yet live. We'll have a link for all packages in each
snapshot, which includes the version number, doc link if available, and
synopsis.
More informative cabal.config
?download=true on cabal.config
authors and install pages
S3 storage example
Changes for nice install page
Support doc maps
Add back old homepage
Add ability to skip migrations
Allow periods in slugs
Only admins can use the lts and nightly slug prefixes