Release 1.7

+ Added "(BOOL)isLocationPermissionAuthorized" method to check if
location permission has been authorised
+ Added "(BOOL)isBluetoothOn" method to check if bluetooth is enabled
+ Added "(void)promptBluetooth" method to ask user to turn on bluetooth
if they haven't already (use in combination with above check)
+ Added "(void)unload" method to completely reset Lighthouse back to
factory defaults
+ Improved "launch" method flow with improved logging when a user
hasn't enabled location / bluetooth yet. Call launch in your
applicationDidLaunch then just ask for permissions when needed.
+ Further updates for iOS 8 support
+ Stability updates
+ Now supports Minimum Deployment Target of 5.1
+ The distance value for ranged beacons will update faster when in
Immediate distance to the beacon, giving a value of 0 rather than
relying on RSSI values.
+ Updated installation instructions
+ Updated example application