add new BeaconManager

add credit for sponsorship

add credit for sponsorship

check for null before instantiating an Identifier

Update README and gradle wrapper for Gradle 1.12

Merge branch 'master' of github.com:AltBeacon/android-beacon-library

fix bug in eclipse bundler

update documentation for recent changes

update readme to link to api migration

Merge branch 'master' of github.com:RadiusNetworks/android-ibeacon-se…

…rvice