Fix spelling error in comments
Add API url that drops a trigger file for updates

The idea is a git repository hook will send a POST to this URL, which
will drop a trigger file somewhere. A cronjob (or inotify listener if
we want to be really fancy sometiem in the future) will pick up that
cronjob and run the update script. The goal being to shorten the time
required to process an update.
Reorder update script to pull static repo first

Prior to this, the static repo would only update if there were
*some* changes in the main repo, which clearly wasn't intended.

Also, shorten the forced delay to 10 seconds.