Initializing the app sends a heartbeat request to Tor to check for
availability, and updates the home page config options accordingly. This
heartbeat is sent on every request, to ensure Tor support can be
reconfigured without restarting the entire app.
If Tor support is enabled, and a subsequent request fails, then a new
TorError exception is raised, and the Tor feature is disabled until a
valid connection is restored.
The max attempts has been updated to 10, since 5 seemed a bit too low
for how quickly the attempts go by.
Executable renamed to "run" to avoid confusion with pip installed script
Updated heroku deploy button to use the heroku-app branch, which by
default enforces HTTPS
Added instructions for enforcing HTTPS on various deployment options,
with note about how this isn't a required task.
Updated setup.py description to use improved app description
