Refactor command.py.
Add licence to top of each file.
Merge pull request #26 from kwurst/feature/cleanup

Feature/cleanup
Make cd=True default for Assignment. Refactor. Format for PEP8.
Merge pull request #27 from kwurst/feature/cleanup

Make cd=True default for Assignment. Refactor. Format for PEP8.
Config file for Lab 1
Add lab2 config file, delete old lab1, lab2 files
Lab 4 configuration file
Lab 3 configuration file
add Project 1 cofiguration file
Add test for issue28
Merge branch 'feature/issue28' of github.com:kwurst/grading-scripts into feature/issue28