[0.5.1] Issue tracking

[scottsand-db]

We should cherry-pick the following commits for 0.5.1:

• TODO: #476
• Cache partition filter result: d9b766b

[vkorukanti]

This repo has been deprecated and the code is moved under connectors module in https://github.com/delta-io/delta repository. Please create the issue in repository https://github.com/delta-io/delta. See #556 for details.