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
Draggable: Changed data uiDraggable to ui-draggable
Draggable: Changed "is" to "closest" for isValidTarget
Build: Add 'jquery.ui.interaction.js' to core files for grunt.
Draggable + Sortable: Fixed blockFrames. Added unit tests specifically for draggable since it should be moving up to "core" file shortly
Droppable: Added greedy option back in
Droppable: "accept" option now takes function
Draggable: Fixed overwriting _setOption to handle both backCompats rather than clobbering itself
Droppable: Changed single quotes to double quotes
Draggable: Undid last commit due, since $.widget properly handles extending multiple times
Droppable: Added activeClass backCompat