require nose for tests
Adding in docopt
While clint2 is still a dependency, it is no long being used to parse user input
This is so that just the command `octogit` will be accepted by docopt and let us print our own help messages. Otherwise docopt think it's improper use and print's it's own help message.
Updating the code to use requests>=1.0 API
The requests library has reached 1.0 milestone and has changed a lot of its API . This commit updates the library dependency and it's API usage  http://www.kennethreitz.com/announcing-requests-v100.html
#123 issue number broke `octogit issues`
Allows `octogit issues #37` in addition to `octogit issues 37`