Update with beta

- Use the latest beta build to have access to the latest :bug: fixes
- Include a license so the terms of the open source code is available
- Add a detailed README with steps on how to use the demo application, as well as adjusting it with custom kits
- Include helpful inline and javadoc comments explain different code decisions and reasoning


That's already in the comments for the code that actually sets geofences: https://github.com/RadiusNetworks/proximitykit-reference-android/pull/2/files#diff-3960cf1857d3b806355e1dd5c89140c0R81