adding project template files.
Update README
removing jquery dependency.
Merge remote-tracking branch 'origin/master'
Refctoring folder structure.
Adding required file templates.
Adding required directives.
Adding controllers.
Added template for demo.
Modified some style for demo app.
Modified some style for demo app.
Some css changes.
Some css changes.
Added Callback methods for sortable directive.
Minor fixes.
sortable Item changes.
minor fixes.
Added drag mouse event methods.
Adding sortable helper factory.
Added code for dragStart and End events.