minor improvements

[pesser]

• dont activate ckpt hook on validation batch (to avoid writing checkpoint without having performed a train update)
• delete results to make sure resources are freed (can avoid running out of memory after a validation pass)
• fix callbacks being replaced in config causing issues with edeval
• handle dependencies better
• wandb integration. closes weights and biases integration #219
• tensorboardX integration
• edexplore improvements
• refactor ProjectManager to run and LogSingleton to log. Added logging of tmux target, pid, pgid. Closes logging in projectmanager #174

[pesser]

• fix issue related to pytorch incompatible scipy version and generally reduce required dependencies. installing only required dependencies is now much faster and the full stack of dependencies can be installed with pip install .[full]

[pesser]

scipy issue is now fixed and pinned to >= 1.4.1. coverage is now pinned to <5.0 (thanks @hperrot #221 (comment))

[pesser]

wandb logging with --wandb_logging True.

[pesser]

did quite a bit of refactoring for ProjectManager and LogSingleton stuff. Both now live in custom_logging.py because they are so interdependent that it doesn't make sense to seperate them. I renamed ProjectManager to simply run and import it in edflow, ie we have edflow.run to get all paths. I think this makes more sense because it really only provides information about the current run and not the whole project. Old names were left for backwards compatibility.

[jhaux]

My only comment has been fixed in a later commit.

[jhaux]

Really nice work! Not so minor in the end! 😄

[hperrot]

nice