GitLab

Adds some backward compatibility code so old inference code still works.

consider the case of pipeline-model prallelism

clean up arugments

argument naming cleanup

update readme and examples

- Accumulate encoder hidden state gradient to handle skip connection
- Correctly compute the number of layers in encoder / decoder for T5 model
- Ensure e weights are initialized the same way in embeddings
- Synchronize embedding gradients across encoder and decoder for T5 model
- Support for checkpoint loading and saving