Gorse v0.4.5

Features

• Implement a playground based on the all-in-one server (#479).
• Support Oracle as one of the cache stores (#482).
• Support Oracle as one of the data stores (#484).

Fix

• Remove tasks from disconnected worker nodes (#480).
• Show progress for index building (#490).
• Fix the isolation level (READ UNCOMMITTED) in MySQL (#481).
• Fix the positive feedback display in the dashboard (#486, by @bradrisse).