add cannot_create_events! annotation
Show event sources and receivers.
When an Agent isn't working, the "No" links to either the Agent's details tab, or its Logs tab, depending on if the most recent log is an error.
Update Agent Index to hide impossible fields.
Minor css
Add about link
Merge branch 'master' into annotate_agents_that_do_not_make_events
Merge pull request #86 from cantino/annotate_agents_that_do_not_make_events

Annotate agents that do not make events
merge