What's Changed
* add convertToGray parameter (replaces ImageType) by martinschorb in https://github.com/AllenInstitute/render-python/pull/166
* Update tilepair client to match asap:develop by martinschorb in https://github.com/AllenInstitute/render-python/pull/167
**Full Changelog**: https://github.com/AllenInstitute/render-python/compare/v2.3.0...v2.3.1