Updated compileSdkVersion and targetSdkVersion to 20
Added demo beacons
Added support for url shorteners - "bit.ly", "bit.do", "adf.ly", "bitly.com", "u.to", "tinyurl.com", "buzurl.com", "yourls.org", "qr.net"
Merge pull request #61 from devashishmamgain/master

Added support for multiple url shorteners
Merge pull request #60 from dinhviethoa/demo-beacons

Added demo beacons
Added region resolver. Updated NearbyDevice adapter.
Merge branch 'master' of https://github.com/matthewsibigtroth/physical-web into scan_result_adapter_addition
Merge branch 'master' of https://github.com/google/physical-web into scan_result_adapter_addition
New region resolver, nearby device adapter.

Implemented region resolver. Replaced nearby device adapter. Updated
metadata server.
Merge pull request #64 from matthewsibigtroth/scan_result_adapter_addition

Scan result adapter addition