(story #264) Add to the action section of the view page of any resource the action "Add to collection". Selecting the action will display a form with:
- text: "Select a collection where you would like to add this resource, or give a name for a new collection."
- a drop-down list of all collections of the user
- a text-field for the name of a new collection
- buttons: "Cancel" and "Add to collection"
When the user presses "Add", a new collection is created if the user has given a name to it, and the resource is added to the newly created or selected collection.
The user is taken back to the view page of the resource.
