Read playlist information from Steering API, instead of Tank API

Parent: [EPIC] Refactor playlist and metadata management (aura#155 - closed)

See parent.

changed milestone to %1.0-alpha6 — Wondrous Whale

added P2 label

assigned to @kmohrf

mentioned in issue aura#155 (closed)

added Cycle [6/24] label

added To Do label

mentioned in issue steering#251 (closed)

closed

removed To Do label