Draggable Tests: Remove Future Unsupported APIs
Draggable Tests: Cleaned up events tests.
Draggable Tests: Cleaned up core and method tests.
Draggable Tests: Added tests for appendTo and axis
Draggable: Added tests for containment and cursor.
Draggable Tests: Grunted
Draggable: Added more tests for grid and cursorAt
Draggable: Added tests for handle and helper, removed trailing whitespaces
Draggable: Added tests for opacity and zIndex
Draggable: Added test for disabled
Droppable Unit: Initial tests - they worked in interaction but not here
Unit Tests: Merged from master_tests. Corrected _blockFrames location
Droppable Unit: Swapped `mouse.js` for `interaction.js`