Add augly transformation support (facebookresearch#442)

Summary:
Pull Request resolved: facebookresearch#442

Add support for augly transformations.

Similar to apex, I made augly install optional for users and didn't add it to requirements.txt -- let me know what you think about this.

Reviewed By: prigoyal, QuentinDuval

Differential Revision: D31462923

fbshipit-source-id: ce793f1adc432b3f1ea08acf4b3f66daa88215a8

Apply bottlers changes from PR208

Apply bottlers changes from PR208