Django Raster Versions Save

• Compatability with Celery 5
• Fix for file lock on windows.

• Added statistics computation to valuecount module. Aggregate statistics (min, max, avg, std) are now part of the aggregation routine for all aggregation calls.
• Increased test coverage.
• Fixed nodata none bug.

Important notice: When upgrading to this version, a data migration is executed.

This release includes a change in the legend model structure. The legend entries are moved to a direct foreign key structure instead of the many to many that exists now. The "code" field values, which are currently stored in a "through" table are moved to an attribute of the legend entry.

This data migration should happen automatically and without problem, but having a backup of your database before upgrading the version is recommended.

Celery>=4.0 is now a requirement. Celery 4 has some breaking changes when compared to version 3.x, so this upgrade might require some work on your celery configuration.

Other changes are limited to several small bug fixes.

• Compatibility with Celery 4.0.
• Fixes time-stamp issue for parse logs on Windows.
• Added setting to force raster parsing in a single task.