underscore for client
added wysihtml plugin to support image uploading from bootstrap-wysihtml5
same as prvesiois, but jqueryupload
script making wysihtml5 able to load images on fly
helper controller which loads files attachable in wysihtml5
added new static resource - attachable folder for wysihtml
added routes for wysihtml5 up/down load helper
added corresponding scripts into news and articles views to make them support files uploading on fly for wysihtml5