0.1.5

BREAKING INCOMPATIBLE CHANGES:

• Removed deprecated ModelMixin. Now only SQLAlchemy.ORM should be used for all queries.

Fixes:

• fixed shielding in base websocket endpoint and test chat endpoint
• fixed nginx sample config
• added missing chardet dependency
• reverted using async with in base http endpoint

Additions:

• added StorageManager interface
• added non-zero retry intervals for all locks