tree-control
https://github.com/wix/angular-tree-control https://github.com/wix/angular-tree-control/issues/274 modded w/ promise & server side - http://embed.plnkr.co/CcRiGi/ by BccSafe
bootstrap-nav-tree
https://c9.io/greentest/angular-bootstrap-nav-tree https://github.com/nickperkinslondon/angular-bootstrap-nav-tree
origin - https://www.pipiscrew.com/?p=14794 angularjs-tree-ctls