closes #346
Merge branch 'develop' of github.com:harvard-lil/perma into develop
Add folder checkboxes.
Remove ipdb comment.
Merge pull request #348 from jcushman/dev.folders2

Add folder checkboxes and move selected items button.
Merge branch 'develop' of github.com:harvard-lil/perma into develop
closes #356
closes #355
closes #355 and closes #354
paging and sorting across pagination and sorting buttons for users. fixes #328
Merge branch 'develop' of github.com:harvard-lil/perma into develop
fixes #351