Pyshotgrid

Feat

- **PyPI**: Use shotgun-api3 from PyPI

Fix

- **new_site**: support tk-core and shotgun_api3 environments

Fix

- **SGEntity**: do not cast url fields to Attachment SGEntities

Perf

- **sg_default_entities**: Improve performance for ".name" property

Feat

- **Field**: Make Field inherit FieldSchema
- **SGEntity**: Add thumbnail and filmstrip properties

Feat

- **SGPublishedFile**: Rename "get_latest_publish" to "get_latest"
- **default-entities**: add "versions" function to all relevant entities
- **core**: Remove "additional_sg_filter" argument from various functions
- **Default-entities**: Add "tasks" function to various entities
- **SGEntity**: Add DEFAULT_SG_ENTITY_TYPE var to make entity_type optional

Fix

- **Field**: remove all field property setter methods
- **SGEntity**: fix pipeline_step argument in _version function
- **SGProject.people**: fix shotgrid query
- **SGSite.pipeline_configuration**: fix various issues with the function

Feat

- **SGPublishedFile**: add methods to query publish versions