Add support for existing USGS earthquake search feature

Support for the existing earthquake search feature is required. Current search functionality relies on the legacy anchor hashtag/json url state. Current functionality appears to forward the latest earthquake app's json url to the search page. The search page then allows additional criteria to be configured and will redirect back to the latest earthquakes app with an updated json url.

The new latest earthquake's app must support the legacy urls for search. Legacy urls should be handled in such a manner as to dispatch the information into state, then maintain a new query-string based search url (integrated with existing query string for the new app) that reflects state.