Update to handling of multiple terms in solr query.  Switched from
"term1+OR+term2" to "(term1 term2)"

Also some cleanup and bugfixes.  Notification for a sent email with a
download link was spotty.  Changed downloadrequest to explicitly say
whether an email request was successful, added some error handling,
better logging.  Download of raster data via wcs from MassGIS was
unreliable: switched back to wms.  Basemap menu in chrome css fix.