Fix typo in loadingTemplate
Fix typo in loadingTemplate

Alexey3/angular-tree-component,Alexey3/angular-tree-component,500tech/angular2-tree-component,isaacplmann/angular2-tree-component,isaacplmann/angular2-tree-component,sm-allen/angular-tree-component,isaacplmann/angular2-tree-component,sm-allen/angular-tree-component,500tech/angular2-tree-component,Alexey3/angular-tree-component,500tech/angular2-tree-component,sm-allen/angular-tree-component