Descarteslabs

Added
- **`Scene.download`, `SceneCollection.download`, and `SceneCollection.download_mosaic` methods**
- **Colormaps supported in `descarteslabs.scenes.display`**
- Task namespaces are automatically created with the first task group

Changed
- **Clients can safely be used in subprocesses without causing obscure SSL errors**
- `descarteslabs.scenes.search` will take a Python datetime object in addition to a string
- **Scenes will now allow Features and FeatureCollections in addition to GeoJSON geometry types**
- Fixed Scenes issue preventing access to products with multi-byte data but single-byte alpha bands
- Scenes now exposes more parameters from raster and metadata

Deprecations
- Removed extra keyword arguments from places client
- Added deprecation warnings for parameters that have been renamed in the Metadata client

Changed
- Moved metadata property filtering to common
- Deprecated `create_or_get_function` in tasks
- Renamed some examples

Added
- Scenes filtering by coverage

Added

- Namespaced auth environment variables: DESCARTESLABS_CLIENT_SECRET and DESCARTESLABS_CLIENT_ID. CLIENT_SECRET and CLIENT_ID will continue to work.
- Tasks runtime check for Python version.

Changed

- Documentation updates
- Example updates

Added
- Scenes package
- More examples

Changed
- Deprecated `add_namespace` argument in catalog client (defaults to `False`
now, formerly `True`)

Changed
- Added org to token scope
- Removed deprecated key usage