Update dragdrop.js

Checking if ui.sender is set by sortable(). If it is, the dragged item is coming from another sortable list.
ngMove() added - responsible to move the object from the old sortable's array to the new one.
ngUpdate() removed (no apparent functionality)
Update demo-dragdrop.js

$scope.moveObject - responsible to move the object from the old sortable's array to the new one.
$scope.updateObjects - removed (no apparent functionality)
Update index.html
Update dragdrop.js

connectWith: ['.draggable','.sortable'] was missing
Update demo-dragdrop.js

fixed array splice typo
Update dragdrop.js

Fixes for multiple sortables
Merge pull request #37 from orszaczky/master

DragDrop fix for multiple connected sortables