Little too late repo init... currently there's a searchable list of test data.
big jump ahead to pretty functional DnD, still needs work.
Misc project config.
Install LoDash
Hide prioritized items & add remove button.
Fix issue with remove buttons when moving from available list to priority position.
Sorta dirty placeholders implementation.
Add input with priority listing.
Add sort+reverse parameters, allow source param to take URL.
Add push to top/bottom function, attribute named submit button (does nothing now).
Changes too numerous, includes:
    - Removal of arbitrary classes & IDs from the directive;
    - Hide first/last push priority buttons as appropriate;
    - Fire event when priorities updated, sends scope item;
    - Fix issues with adding;
    - Misc cleanup/refactoring/things I regrettably forgot.