Fix for broken link in compilation view to items
Abstracted mods helper implementaiton to a module so its DRY for collection and core file
Merging in David's changes.
Removing .DS_Store
Render create collection button will now properly use the root collection id when appropriate.
Merge branch 'develop' of https://github.com/nu-lts/drs-sufia-app into develop

Merging in David's changes.
Merge branch 'develop' into feature/composite_core_objects