Removed SwiftyJSON dependency. Simplified JSON logic.

[harlanhaskins]

The SwiftyJSON dependency wasn't really necessary. This'll allow us to make a nice CocoaPod much easier.

[incanus]

Thanks for kicking this off @harlanhaskins. There's a lot going on in here aside from SwiftyJSON, though (Release build, whitespace, checkout-related things). Can you clean it up a bit so we can evaluate in context, and more importantly, possibly merge just the JSON improvements?

[harlanhaskins]

Apologies for the whitespace; I ran ctrl+i.

I'm not quite sure why Xcode added that defaultConfigurationName thing -- I think that's something Xcode 6 does automatically.

[harlanhaskins]

Also, I accidentally committed my Xcode workspace data because the project had no gitignore.
I can remove the gitignore, but I'd say it's a very useful thing to have.

[harlanhaskins]

Also, the checkout file needed to be modified if SwiftyJSON is no longer going to be a hard dependency.

[incanus]

Closing in favor of review of #7.