Merge pull request #175 from bitzesty/master

be more specific in spec
FIX: don't reset state for already existing entries during downloading phase
Silence Elasticsearch NotFound exceptions during delete operations
Merge pull request #176 from bitzesty/download_fix

FIX: don't reset state for already existing entries during downloading phase
Merge pull request #177 from bitzesty/silence_elasticsearch_errors

Silence Elasticsearch NotFound exceptions during delete operations