revert to 0.2.7 tag

Update version to 0.2.6.

release for Di

0.2.3

Reorganize bounding box utilities and namespaces (keras-team#439)

* Reorganize bounding box utilities and namespaces

* regorganize bbox api entrypoint

Update preprocessing namespace (keras-team#438)

* Update preprocessing namespace

* Update __init__.py to have all utils

0.2.1

0.2.0

Update comment

v0.1.0 release