Version 1.4.1 - Nowplaying status update

This minor version update adds the now-playing status message, which, at a
configurable interval, polls the Cadence Radio server for information on
the currently playing song, and sets it as the bot's status message. This
feature was suggested by @kenellorando.

This feature, if desired, can be disabled entirely, by setting the
interval to a negative number in config.json. This will set the
nowplaying information to 'Cadence Radio'.

Additionally, this version includes an update to the help message for
request, to be more inclusive of one-step-request.