Added go link, improved Web UI
Improved favicon detection
discovery of mdns urls
Update getting_started to reference Blesh beacons
broke out mdns logic into its own class
added license text to mdns class
Fixed refresh in background. Report error when icon is not valid
implemented recommendations pt 1
discovery service simplification

Matched the pattern used in NearbyBeaconsFragment for ble scanning.
Merge pull request #225 from dinhviethoa/go-link

Go link
added mdns to UribeaconDiscoveryService
implemented comment recommendations
removed unused imports
Merge pull request #226 from matthewsibigtroth/mdns_urls

discovery of mdns urls