Implemented GET for document resources
Merge branch 'master' of github.com:rossdylan/docliber

* 'master' of github.com:rossdylan/docliber:
  removed leveldb reqs and added rethinkdb ones
  MEGACOMMIT, stripped out all the leveldb and switched to rethinkdb so we can actually have multiple processes accessing the data
Merge branch 'master' of github.com:rossdylan/docliber

* 'master' of github.com:rossdylan/docliber:
  Fixed MetaEngine.search and made it more power using rethinkdb
Merge branch 'master' of github.com:rossdylan/docliber

* 'master' of github.com:rossdylan/docliber:
  Operating on peers using rethinkdb id instead of ip addr
Implemented POST for the documents resource
Moved PeerResource and PeerInstance to a peer module
Moved the DocumentResource to a document module
Merge branch 'master' of github.com:rossdylan/docliber

* 'master' of github.com:rossdylan/docliber:
  Added a script to test pdf ingestion from the file system
  Switch to using shutil.move instead of os.rename
Updated the peer resource for the rethinkdb backed libredb
Updated the peer instances for the new libredb
Updated the document resource for the new libredb
Implemented GET for a document instance
Implemented DELETE for a document instance