Version 2.0

• Updated Azure native libraries to version 3.4.0. Note that with the new version of the libraries for Android Microsoft requires your project to be built with minSdkVersion set to 19. This requires changes to your app's files which are outlined in the readme.
• Added methods registerWithTags and registerWithTagsAndTemplate that allow users to segment devices via tags. You can read more about Azure push tags here. (#17)
• Added property installationId to the push object which can be used to update the current device's tags on your backend.