update(version): update angular version to cdn=1.3.0-beta.3 and branch version=1.2.15 for branch 1.2.*
update(version): update angular version to cdn=1.3.0-beta.3 and branch version=1.2.15 for branch 1.2.*

angular/angularjs.org,angular/angularjs.org,angular/angularjs.org