Fix up app.json.

Remove extraneous character.

Update app.json, add deployment button back.

Remove reference to maybe class.

Clean ups in response to code review.

Reorder bullets.

Handle case where user is already disconnected, so token is nil.

README updates.

Fix typo.

Add a 'Why Ruby?' section.

Add changelog.

Thread safety and database connection improvements.

Clean up CsvLog.

Clarify process names.

Delete heartbeats during shutdown.