Access control widget: create view and styling
Layout structure improvement
More readable/intuitive messages related to upload progress
In the hierarchy widget, if a folder has no children, say so

We now show a nice message telling the user it's empty.
Build and pass access control list to the server on save
Break out search results widget, add Resource controller
Working text-search widget.

It is now plugged in to the access-control widget for searching
groups and users.
Fully functional access control widget
Working search boxes on collection and user list pages
Access control on collections

And implement a more functional collection actions UI
Style improvements in access UI
Fix failing tests, clean assetstore before file test
Add a test for resource search
Merge pull request #73 from girder/access-widget

Access widget and general text search endpoint look good. the general search bar isn't working. I'll open an issue for that.