Update bower.json
Update bower.json

bower ENOTFOUND     Package twbs not found -> should be replaced by bootstrap instead
SiteRadar/angular-bootstrap-nav-tree,romanmandryk/angular-bootstrap-nav-tree,caffeinetiger/angular-bootstrap-nav-tree,Repalogic/angular-bootstrap-nav-tree,wesleyliu/angular-bootstrap-nav-tree,caffeinetiger/angular-bootstrap-nav-tree,SiteRadar/angular-bootstrap-nav-tree,nickperkinslondon/angular-bootstrap-nav-tree,wesleyliu/angular-bootstrap-nav-tree,b-pos465/angular-bootstrap-nav-tree,Repalogic/angular-bootstrap-nav-tree,nickperkinslondon/angular-bootstrap-nav-tree,b-pos465/angular-bootstrap-nav-tree,romanmandryk/angular-bootstrap-nav-tree,kzganesan/angular-bootstrap-nav-tree,kzganesan/angular-bootstrap-nav-tree