Display build queue in console

[dogonthehorizon]

As a Bartlett user I would like to be able to display the currently running build queue of my Jenkins instance, so that I can have an accurate snapshot of the Jenkins server.

AC:

• [ ] when no options are given, the user is given a JSON representation of the build queue
• [ ] when the streaming option is given, the user is presented with a refreshing textual display of the build queue