Setup Inspector test suite

@joshbedo and I sat down and added test support for the inspector. This will be great for testing some of the cool stuff in the inspector. I don't think we should shoot for 100% coverage w/ the inspector cause it's a dumb marionette app, but we could do some stuff... curious to see what you think of this setup, re-using require configs can be gnarly.

p.s. now that we're starting the inspector in a non-chrome-devtools environment we're a small jump away from starting the inspector in a simulated enviornment where we can write new features and do cool things w/o the burden of an app window, inspector window, inspector inspector window, and all the other rigmarole associated w/ the work we dooooooo. @nerdpruitt this is for you. css changes suck in the current setup.


ping @ianmstew - this is for you and your crazy activityTree
ping @samccone, @thejameskyle, @paulfalgout, @joshbedo, @cmaher 

:beers: 
I think these 2 particular versions of backbone and marionette are only necessary for the agent.. no reason they won't work here, but they're not the ones inspector is using.