Changed update_count to be an optional parameter that defaults to zero for the run_as_update method.

Added an update-limit for the max number of recursions.  Mainly for goes,  but really should work for any algorithm, where the user doesn't care to crawl back days, weeks or years.

Changed argument from forceout to output-edge-forceout, to be consistant with other argument naming conventions

Added delta to the update recursion.  Added check to determine if an algorithm has the data ranges it need to function.  Encased run_as_update/run options parameter as an object.

Use starttime/endtime from the options parameter instead of being passed in as a seperate parameter.