Add ability to update an already running channel

[makstermaki]

Currently, the application only checks if a channel is already running on every run. If between runs, a new show is added to an already running channel, the application will simply see the channel is already running and skip processing of the channel. Additional functionality should be added where the application completes a "deep check" on the running channel, not only checking if it's running but also checking the configuration settings for the channel. If any configuration changes have been made, the channel should be killed, and restarted with the updating settings.