Hyperparameter search

[alecgunny]

Adding hyperparameter searching functionality. Closes #28 , closes #7 .

• Find a way to fix logging. Maybe use TUNE environment variables in deepclean.logging to set up different files for each job.
• How to pass best weights to export? Copy them to root weights.pt at end of training? Use tune library in export?
• Save all HP runs to dedicated subfolder instead of having subfolders in root?
• Publish all HP runs in analysis? Just best?

Longer term

• Integration with typeo for more natural extension of training function without re-exposing all args
• Extend architecturize wrapper to search function to simplify search for particular architectures