Fix iOS issue with maximumAge

Fixes:

• fix iOS returning old location when maximumAge is set

v4.2.1

• apply fix suggested in #86
• update demo app with background service (Android only) from #87

v4.2.0

• Flexible version support for Google Play Services - fixed issues #76 and #81
• More info about updateTime/minimumUpdateTime
• Fixed Angular change detection in watchLocation

v4.1.0

Introduced new options for background locations in iOS. Fixed issue #44.

New:

• options.iosAllowsBackgroundLocationUpdates - Allow the application to receive location updates in background (ignored on Android)
• options.iosPausesLocationUpdatesAutomatically - Allow deactivation of the automatic pause of location updates (ignored on Android)

v4.0.0

Replaced the Android Location Manager approach with the Google Play Location Service one (used by Google Maps) as there are a lot of known issues with the Location Manager and it's not the recommended approach for getting a location on Android.

Fixed issues #42, #52, #62, #64 and #69.

Breaking changes:

• isEnabled returns 'Promise' instead of 'boolean'
• updateDistance option is not available for android anymore, use updateTime instead. A hint from Google: update interval of 5000 milliseconds (5 seconds), causes the location provider to return location updates that are accurate to within a few feet.

v3.0.1

New

• Comply plugin with the plugin seed structure
• Enable Travis CI build

Minor

• Update Readme