Finally! change the visualization code to read the location points directly
Finally! change the visualization code to read the location points directly

In particular, we can now directly query for points within a particular
region and time window by getting entries from the CLEANED_LOCATION_KEY. We
can use the new extra_queries feature from
4404b897b94c65544f274e502ad76ec7e3e994a3 to directly query for points with a
particular mode, without going through sections. The points will be uniformly
spaced irrespective of platform or sensing parameters, so the heatmap
actually makes sense.

yw374cornell/e-mission-server,e-mission/e-mission-server,sunil07t/e-mission-server,shankari/e-mission-server,e-mission/e-mission-server,shankari/e-mission-server,sunil07t/e-mission-server,e-mission/e-mission-server,sunil07t/e-mission-server,shankari/e-mission-server,yw374cornell/e-mission-server,sunil07t/e-mission-server,shankari/e-mission-server,e-mission/e-mission-server,yw374cornell/e-mission-server,yw374cornell/e-mission-server