mikeash/MAKVONotificationCenter — pull request #17 by naan (2014-07-08 04:54:24+00:00)
Title: Add observation to MAKVONotification

I added observation to MAKVONotification so that I can remove observation from a block like this:

```swift
course.addObserver(nil, keyPath:["progress", "contentDownloaded"], options:nil, block: {(note:MAKVONotification!) in
switch note.keyPath! {
case "progress":
println("progress \(course.progress)")
case "contentDownloaded":
note.observation.remove()
default:
println(note.keyPath)
}
})
```