Merge pull request #3 from BooDoo/master

Added add_friend() and delete_friend()
Add support for stories and an example of use. Fix bug preventing use when installed.

Fix various style issues to comply with PEP 8
Merge pull request #4 from colatkinson/master

Add support for stories
Add user-agent header. Fixes #5
Use pip-compile to compile requirements
Add tests for login and logout
Add notes about contributing
Update pycrypto and requests
Correct markdown syntax
Update readme
Detect and handle zipped videos. Fixes #8