WIP: New split lib workflow

We need to:
- [ ] check that meta-analysis is still working
- [ ] finish preprocessing (split libs) connect per prep template
- [ ] make preprocessing async
- [ ] be able to connect to other studies raw data
- [ ] fix metadata summary per prep template
- [ ] add EBI submission
From flake8's documentation:

```
This utility does not enforce every single rule of PEP 8. It helps to verify that some coding conventions are applied but it does not intend to be exhaustive. Some rules cannot be expressed with a simple algorithm, and other rules are only guidelines which you could circumvent when you need to.
```

It is good practice to write for the future, and from searching the rest of the qiita codebase, all other `except` statements use the `as` form. So in that respect, it is also better that the project be consistent.

PEP-8 actually describes quite a bit about style and it goes well beyond what PEP-8 and flake8 catch.