remove docstore.status

It's easier to just check with official elasticsearch API
DDR.docstore.post infers model from document
use a more appropriate blank sort arg
don't pass index,pagesize args to ES.search

We're not using ES paging because Django pagination needs the
entire result set
update DDR.docstore.index to incorporate official ES API

- Removed 'newstyle' index since it's all newstyle now.
- Removed model arg from post() since it can infer the model.
- Add object_id to files bc they're lame and don't have it.
- Return bad post feedback in consistent format.
update ddrindex to incorporate office ES API changes

- Removed commands like status and settings where it's easier
  to just use the official API.
- Updated to reflect changes to post() and index()
add 'id' to file public_fields on index

For some reason this field is not in the File JSON files.
post() needs it to infer the model though.
update docstore example walkthrough