Add lint.Fprint helper for unchecked fmt.Fprint calls.
Use lint.Fprintf/Fprint in api/event.go, api/image.go, rmo/root.go.
Add explicit error check for fmt.Fprintf in middleware/terminal.go cW.
This is a pretty big refactor of how communication works to start moving
us in the direction we want to go long-term. This adds the new
communication row and migrates existing reports to add rows for
communication.
There's also a bunch of automatic fixes from the new linter. I should
have added them separately, but whatever.
