chore: update package info
chore: fix license info and some jshint errors
feat(angular-drag-drop): fix code indentation
feat(angular-drag-drop): fix demo code indentation
chore: add concat grunt task
feat(angular-drag-drop): remove unused code
feature(angular-drag-drop): fix some jshint errors
feat(angular-drag-drop): improve draggable interface
feat(angular-drag-drop): remove isolate scope from draggable
feat(angular-drag-drop): add draggable handle
feat(angular-drag-drop): improve demo a little
feat(angular-drag-drop): polished droppable implementation
feat(angular-drag-drop): update demo
feat(angular-drag-drop): update draggables and droppables demo
feat(angular-drag-drop): add TODO