Issue #182 included acts_as_list in tracl's model
Issue #182 added acts_as_list gem & testing drag&drop list
Issue #182 working drag and drop functionality
Issue #182 added 'jquery.sortable.js' as a plugin & sorting is working
Issue#182 removed 'acts_as_list' gem. It caused many errors.
Issue #182 fixed drag&drop functionality

Conflicts:

	tutor/app/views/tracks/index.html.erb
	tutor/app/views/tracks/show.html.erb
Issue #182 used a new plugin for the drag&drop 'tablednd' and used 'acts_as_list' gem
Issue #182 different drag&drop functionality
Issue #182 removed 'acts_as_list gem'
Issue #182 Slight changes in track's index view
Issue #182 updating with master branch
Issue #182 Added dialog box functionality in topic's show view.
Issue #182 slight modifications to the track's show view
Issue #182 Further modifications to the dialog box
Issue #182 Added comments to the track's show view
Issue #182 the list of tracks appears inside the dialog box
Issue #182 Working drag&drop inside dialog box.
Issue #182 testing sending new order to the db
Issue #182 Fixed issue with dialog box
Issue #182 fixing Ajax call on sortable list