adding acdc dataset example for readme

Merge pull request PhoenixDL#116 from ndalton12/patch-1

Update loader.py to add DDP support

Merge pull request PhoenixDL#102 from FirasGit/master

Fixed Typo in README.md

remove line

the example notebook was moved to the next release

Merge pull request PhoenixDL#34 from PhoenixDL/key_transforms

Key transforms

Update setup.py

push coverage to 100% and small refactoring