Now we don't have checkboxes, but instead we restrict you to selecting
directories and albums from only one level in the hierarchy. This
makes it easier for us to make sure that we properly create the
hierarchy that you want and avoid confusion about what's going to wind
up where.
Modify Server_Add_File_Model to have a parent_id and item_id and then
modify them as we go so that we can build up a tree structure there
*before* we create any items. This makes it much easier to figure out
where a new item is going to go and get rid of a bunch of probably
buggy code in the main task.
files out in a separate model for scalability. Removed the "pause"
functionality.
- Server_Add_Controller extends Admin_Controller so that we don't have
to check for admin every time.
- Task completion time now factors in the time it takes to walk the
arbitrarily deep trees
- Moved checkbox management entirely into JS using jQuery
- Simplified the JS considerably
