Updated for Xcode 6.1 / iOS8.1

Swift compatibility fixes for Xcode 6.1 and iOS 8.1
Merge branch 'master' of https://github.com/gemtot/iBeacon

Conflicts:

GemTotSDK.xcodeproj/project.xcworkspace/xcuserdata/Nick.xcuserdatad/User
InterfaceState.xcuserstate
GemTotSDK/GemTotSDK/Extensions/GTExtensionNSData.swift
GemTotSDK/GemTotSDK/Obejcts/GTBeaconBroadcaster.swift
GemTotSDK/GemTotSDK/Views/GTBeaconTableViewController.swift
Updated for Xcode 6.1 / iOS8.1

Swift compatibility fixes