Wandb

:nail_care: Enhancement

- wandb.Audio supports duration

:bug: Bug Fix

- Pass username header in filestream API

:nail_care: Enhancement

- New wandb.Audio data type.
- New step keyword argument when logging metrics
- Ability to specify run group and job type when calling wandb.init() or via
environment variables. This enables automatic grouping of distributed training runs
in the UI
- Ability to override username when using a service account API key

:bug: Bug Fix

- Handle non-tty environments in Python2
- Handle non-existing git binary
- Fix issue where sometimes the same image was logged twice during a Keras step

:nail_care: Enhancement

- PyTorch
- Added a new `wandb.hook_torch` method which records the graph and logs gradients & parameters of pytorch models
- `wandb.Image` detects pytorch tensors and uses **torchvision.utils.make_grid** to render the image.

:bug: Bug Fix

- `wandb restore` handles the case of not being run from within a git repo.

:bug: Bug Fix

- We now open stdout and stderr in raw mode in Python 2 ensuring tools like bpdb work.

:nail_care: Enhancement

- Catastrophic errors are now reported to Sentry unless WANDB_ERROR_REPORTING is set to false
- Improved error handling and messaging on startup

:bug: Bug Fix

- The first image when calling wandb.log was not being written, now it is
- `wandb.log` and `run.summary` now remove whitespace from keys