RailsStat displays a the current requests and lines logged per second. Default interval is 10 seconds.
Creates a new RailsStat that will listen on io and print every interval seconds. offset is only used for multi-file support.
RailsStat.start 'online-43things.log', 'online-43people.log', 10
Starts a new RailsStat for filenames that prints every interval seconds.
Stats for multiple log files requires curses.
Starts the RailsStat running. This method never returns.
[Validate]