Reverting changes to .gitignore: config.py is not ignored now
Reverting changes to .gitignore: config.py is not ignored now

Removing changes from the last two commits since they removed config.py from
the repo completely

noellekimiko/HMC-Grader,noellekimiko/HMC-Grader,noellekimiko/HMC-Grader,CSGreater-Developers/HMC-Grader,noellekimiko/HMC-Grader,CSGreater-Developers/HMC-Grader,CSGreater-Developers/HMC-Grader,CSGreater-Developers/HMC-Grader,CSGreater-Developers/HMC-Grader,noellekimiko/HMC-Grader,noellekimiko/HMC-Grader