[Echo.App.ClientWidget] rename callback -> next; splice initializers
Merge branch 'core-updates' of github.com:EchoAppsTeam/js-sdk into core-updates
Merge branch 'core-updates' of github.com:EchoAppsTeam/js-sdk into core-updates
[Echo.App] rename statics -> classMethods, minor code updates
[Janrain Auth] add "rul" parameter for the plugin "JanrainConnector"