Add link to Bugzilla for reporting issues when things break.
#25: Add ShoveInstance model and command to keep the table up-to-date.
#25: Associate ShoveInstances with projects and run commands on them.

Shove now informs Captain of the projects that it can run commands for,
and Captain in turn allows the user to specify which ShoveInstances they
want their command to run on.
#25: Allow user to specify which hostnames to run scheduled commands on.
Update to latest bootstrap and include JS.
#25: Add new log page for commands sent to multiple hosts.
Tests and tweaks.