Cc 5709 airtime analyzer cloud storage

Code review 1
I'm going to bug you to comment all these functions and the class. Comment the classes and each function, following PEP 257 and the Google style guides:
http://legacy.python.org/dev/peps/pep-0257/
http://google-styleguide.googlecode.com/svn/trunk/pyguide.html?showone=Comments#Comments

You don't have to do this now. I'll bug you again next time I review the code.