AngularJS Treeview Directive

Testing this directive for file and template display http://jsfiddle.net/eu81273/8LWUc/18/.
Added more files for treeview test

And created new file_management.html file for testing
First working-ish version of Angular
You can have a look at the min-selector.php page for an idea on how this could work.
Please note it is very much in Alpha. But comments are welcome and I will keep working
on it. Make sure you log in first or it will not display any data. refs #117