Add cron handler to retrieve extra info automatically

Tweak deferred system a bit to always bind to plugin

Better .gitignore for db files
Try to fix some promise queue stuff?
Some more attempts at fixes
Rename current_challenge to challenge_current
Tweak font size
Rework www challenges code; retrieve data in a less stupid way

Fixes page breaking when there are no active challenges
Correctly parse "kmap" attribute on player death
Rename 'watchlist' plugin to 'crawl.watchlist'
Tweet player deaths
Fix win tweets showing 'undefined'