Fix OFFSITE_HOST when not set.
replaced tabs with spaces
does not call xhr.ajaz, added new shake map station layer object using url, added to layer control but not to map
added ajax call, created onAdd method
replaced tabs with spaces
fixed ajax success callback so that the request is only fired once
only downloads once
Minor spacing corrections.
Merge pull request #121 from emartinez-usgs/LATESTEQ-243

Merged.