Update travis.yml to use node 4.2.4

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.

Added some debug checkprint I'm using in production.  Changed the starttime to subtract 2200 seconds, seems to work better

io arguments fix

Monitor

Try travis using the php/container environment

Set b0 to 0 and s0 to list of 0s by default

Add plot output factory

Usgs/geomag algorithms#77