Updated compileSdkVersion and targetSdkVersion to 20
Reduced compileSdkVersion and targetSdkVersion
Merge pull request #56 from matthewsibigtroth/reduced_sdk_version

Reduced compileSdkVersion and targetSdkVersion
Http prefixing fixes

Checking for http prefix in the url when launching the browser. Also
added similar checks in metatdataresolver to accommodate the proxy
server.
Merge pull request #57 from matthewsibigtroth/url_prefix_fixes

Http prefixing fixes
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
Prefix URL with http:// if they have no scheme, got rid of unused code, validate SSL certificates, expands URL shorteners, check if the favicon exists
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
closing unmatch bracket
removing duplicate namespace definition
Deleted initialization of scan mode. Only used once so no need to make a new variable for it.
Initialize the filter directly instead of initializing the builder first.
Revert "Added support for multiple url shorteners"