Missing __init__.py files in core and db folder

[thomas-serre-sonarsource]

Hello!

I noticed that __init__.py files do not exist in core and db folders. Though, core is used as a python package.
Indeed, this is valid Python, and it will work with a Python interpreter in a version greater than 3.3.

However, I think adding these files would be a better practice to indicate that core and db are Python packages.
First, packages without __init__.py files or namespace package are usually used to organize multiple packages, which is not the intention here.
Also, __init__.py files are present in similar projects like for example in skflabs

Would it be possible to add __init__.py in the core and db folders so they will be standard python packages? If you agree, I'll create a PR for this.
Thanks!

[dolevf]

Hi there. Yes, this is possible!

[thomas-serre-sonarsource]

Alright. I've created the PR.
Thanks!

[thomas-serre-sonarsource]

I'll close the issue once the PR is merged ;)