Create competition zip command for easy testing.

Simply run the command and it will generate a sample_competition.zip

python manage.py create_competition_zip
unnecessary imports and options removed, spelling and spacing issues.
create a sample solution for the fake comp.

Sister command for create_competition_zip that creates a fake submission. you can add -w to get a wrong submission.

python manage.py create_solution_zip
fixing indentation
removes duplicate write
Merge branch 'feature/competition-generator' of https://github.com/Tivix/codalab into Tivix-feature/competition-generator
Very minor formatting and spelling changes
Merge branch 'Tivix-feature/competition-generator'
Merge branch 'master' of https://github.com/codalab/codalab into dev