Moved Homework List to use a hw.yaml
Added base hw.yaml to ofCourse cli
Added whitespace for PEP8 compliance
Added trailing comma to args list
Removed legacy homework key reference in blogs.mak
Keys now have warning if hw.yaml is missing
Changed hw.yaml to use named lists
Renamed hw.yaml to assignments.yaml
Merge pull request #9 from liam-middlebrook/hwYaml

Homework assignments are now listed in `assignments.yaml`