PEP8 compliance and documentation about requiam HOT 2 CLOSED

README.md has been a bit outdated. It needs to include discussion of

• Provide description on configuration settings [6194252]
• Documentation of manual override [338c08f]

from requiam.

While working on #93 I found some style issues including:

1. multiple spaces before assignments in several scripts as in scripts/org_code_numbers.py

a    = 'a'
ab   = 'ab'
abc  = 'abc'

2. F-strings with no place holders as in f'foo bar' in scripts/manual_override.py
3. Some unused imports like from os import path and from os import mkdir in scripts/org_code_numbers.py

I am not sure if 1 is for clarity, but I think fixing the other ones could be part of this issue.

from requiam.