2.1.1

This release contains:

1. cometx download --from wandb now supports annotation boxes
2. cometx log WORKSPACE URL|ZIP|PY --type panel - log panel to workspace
3. cometx copy workspace/panels dst - copy panels to workspace
4. cometx download workspace/panels source - download panels from workspace
5. Updates to Jupyter %%cometx magic
6. cometx list workspace/panels - list panels
7. cometx list workspace/name_or_id - list panels details
8. Updates to cometx.API() to support panels
9. cometx log workspace FILE1 FILE2... - updated log to handle multiple files
10. cometx copy fixes for confusion matrix