Added PyLint as a Base Checker and Updated Comments and Rules

[BethanyG]

• [x] Added logic in pylint_comments.py to exempt line checks from comments.
• [x] Added logic in pylint_comments.py to consider docstrings, module docstrings, and trailing lines as "informational" only.
• [x] Corrected spelling in exercise.py & analysis.py
• [x] Added the same analyzer comments that are in website-copy, for testing purposes.

This should be enough to use Pylint as a "base" analyzer for exercises. Obviously, this will need to be refactored..but we're calling this done for launch.

[BethanyG]

@kotp -- I think I am going to leave the one sentence per line change for a follow-on, since I am eager to merge this in right now so I can add the base checkers for our concept exercises.

[kotp]

OK, I was going to approve if you have the changes, it would take a few moments… But either way.