Added files to animation app like exercise 13-2
Added files for class_transitions
Added files for color_transitions book app
Added files for draggable/droppable book app
Added files for resizable interaction book app
Added files for selectable interaction book app
Added files for sortable interaction book app
Enhanced vecta_corp app that has been the main app across jquery chapters
Merge pull request #17 from adelman1/jquery-ch13

Jquery ch13 files added to master branch