Code examples in README.md are outdated

I'm using SDK in latest available version at the moment, i.e. 1.4.1, and example snippets are inaccurate.

EPXProximityObserver has been renamed to ProximityObserver
ProximityZone argument order has changed (tag must precede range)
at the top of the snippet ProximityObserver is assigned to self.proximityObserver, and at the very bottom self.observer is being used

Below is fixed example.

        let credentials = CloudCredentials(appID: "your-app-id", appToken: "your-app-token")
        self.proximityObserver = ProximityObserver(credentials: credentials, onError: { error in
            print("Oops! \(error)")
        })
        // Define zones
        let blueberryZone = ProximityZone(tag: "blueberry", range: ProximityRange.near)
        blueberryZone.onEnter = { zoneContext in
            print("Entered near range of tag 'blueberry'. Attachments payload: \(zoneContext.attachments)")
        }
        blueberryZone.onExit = { zoneContext in
            print("Exited near range of tag 'blueberry'. Attachment payload: \(zoneContext.attachments)")
        }

        blueberryZone.onContextChange = { contexts in
            print("Now in range of \(contexts.count) contexts")
        }

        // ... etc. You can define as many zones as you need.

        // Start proximity observation
        self.proximityObserver.startObserving([blueberryZone])

Estimote / iOS-Proximity-SDK

Code examples in README.md are outdated #47