Issues with solutions files

[c-cunningham]

The file solutions/check_normalized.py , referenced in module 1.5.2, doesn't seem to exist. There are some other issues with solutions as well. The solutions for the first exercise of 1.5.1 and the extended exercise of 1.6.4 didn't work for me. Also, some of the solutions files have queries as if they are early drafts still being written. It would be good to check that every solution file exists, is complete, and works with Python 3.

[armanschwarz]

Hey Connor, sorry if I missed it, but did you resolve some of this with your commits?

[c-cunningham]

Hey Arman, as far as I can remember I haven't resolved any of this. For the most part I wasn't sure how to resolve it. I can look through again and see if there's anything I'm more able to resolve now that I have a few months of experience.