Add acts_as_tree gem to allow folder hierchichal behaviour
add folder creation functionality and add extra test to upload document spec to check behaviour when no file is selected, also make first file upload spec slow
Add spec to test the presence of name for folder model
Add icons to respresent folders or documents, also add new folder button
Add folder browsing by implemention browse action in libraries controller, also make sure that folders and documents in library show action belongs to root
Add subfolder creation
Add breadrumbs to library show and new folder page
Add file uploading in the folders
mark file creating inside folder spec as slow since it loads real file in the spec