Failing to install SwiftyJSON

I want to include SwiftyJSON into my Xcode 6.3 project.

When I try to build it get about 40 compiler errors. Most of them are similar to 'AnyObject' is not convertible to 'String'. Did you mean as! to enforce downcast?

I followed the tutorial steps:

1. Download SwiftyJSON (http://ift.tt/Z2t6lA)
2. Drag and drop the SwiftyJSON.swift to my Xcode project.
3. Accepting the "copy if necessary".
4. Re-build project.

My best guess is that since I'm so new I'm missing some very "obvious" step.

Tutorial used: http://ift.tt/1tkN0Ql