Bunch of fixes to the code to read from the raw dumps
Bunch of fixes to the code to read from the raw dumps

- Store the data in the usercache and the section db since the rest of the code
  assumes that
- Add a bunch of hopefully useful fields to the objects, such as prev and next sections
- rename startTs to start_ts and so on to be consistent with our style guidelines
- store the points correctly with both data and metadata

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