add missing to packages

[Krovatkin]

This PR adds missing __init__.py to any directory with python files, so setup.py can find all packages and install them correctly.

[Krovatkin]

@Haiyang-W Thanks for the great work! I've noticed I can't use this package as a 3rd party dependency installed in site-packages due to setup.py not copying all the python files into the package.

[chenshi3]

@Krovatkin Thanks for your contribution. I will check and merge this PR.

[chenshi3]

@Haiyang-W Thanks for the great work! I've noticed I can't use this package as a 3rd party dependency installed in site-packages due to setup.py not copying all the python files into the package.

The __init__.py under the tools folder is not necessary. You may consider deleting these files.

[Krovatkin]

I believe if we remove tools/__init__.py, we won't be able to use any one of these as packages either:

tools/__init__.py
tools/eval_utils/__init__.py
tools/process_tools/__init__.py
tools/train_utils/__init__.py
tools/visual_utils/__init__.py

Could you please advise me if this behaviour is what we want?

[Krovatkin]

@chenshi3 ^^