Release 7.4.6

Merge branch 'develop'

* develop:
  We need to make sure we are shifting startsAt after range extraction.
  Hashes may not be ordered at the time of getting ranges or merging.
  Let's make sure we capture some details in case test fails intermittently.
  We actually need AVHashes to operate.
  Let's provide hashes in the result of ReadHashesByTrackId, in order to have a clearer picture regarding length of the fingerprints.
  Let's provide a method that will give us range of hashes from existing hashes.
  Adding the ability to read fingerprints by track ID.
  Update README.md
  Adding a test for consecutively repeating queries.
  Delete _config.yml