Raster-loader

Enhancements
- Store raster nodata value in table metadata (111)
- Add level to raster metadata (110)

Bug Fixes
- Fixed issue in metadata when updating table (112)

Enhancements
- Create raster tables with geography and metadata (105)

Bug Fixes
- Fixed band in field name (102)
- Dockerfile - avoid installing GDAL twice (104)

Enhancements
- Updated setup.cfg and readme (70)
- Bumped wheel from 0.37.1 to 0.38.1 (63)
- Added a basic docker-compose based dev environment (80)
- Use quadbin (72)
- Raise rasterio.errors.CRSError for invalid CRS and Add test error condition (89)
- Cluster "quadbin raster" table by quadbin (95)
- Changed the endianess to little endian to accomodate the front end (97)

Bug Fixes
- Fixed swapped lon lat (75)
- Fixed performance regression bug (77)
- Added small speed hack (79)

Documentation
- Added docs badge and readthedocs link to readme (69)
- Updated contributor guide (91)
- Updated docs for quadbin (93)

Added
- raster_loader module
- rasterio_to_bigquery function
- bigquery_to_records function
- rasterio_to_bigquery.cli submodule
- upload command
- describe command
- info command
- docs
- tests
- CI/CD with GitHub Actions