Logging + repo reorg

[prakaa]

Minor feature:

• Move warnings, user feedback, etc. to logging. Doing so will allow feedback to be silenced in say a Jupyter notebook via:

import logging
logging.getLogger().setLevel(logging.ERROR)

Code style:

• All code autoformatted using black
• Relative imports within module

Repo org

• Deleted smoke test script
• Moved tests to tests/
• Query wrapers to Query wrappers

Closes #25

[prakaa]

@nick-gorman, sorry about that logging error. Fixed up now, so logging.getLogger("nemosis").setLevel(logging.WARNING) should work now

[nick-gorman]

Thanks for adding this functionality @prakaa

I've updated the tests for the bidding data because AEMO's window of which bidding files are uploaded to nemweb has changed since we last tested. Now all tests are passing.

I've also added an example of how to disable logging to the readme.