Web Resources and Nav

-	modified:   app/assets/javascripts/application.js
-	modified:   app/assets/stylesheets/dashboard.css.scss
-	modified:   app/views/dashboard/base/index.html.erb
-	modified:   app/views/dashboard/base/resources.html.erb
-	modified:   app/views/layouts/_nav.html.erb
-	modified:   app/views/layouts/_staff_nav.html.erb
-	modified:   app/views/layouts/_student_nav.html.erb

- Changed jQuery-UI sortable css so there is no font decoration or height. Responsive with-in bootstrap col.
- Removed jQuery ".deselectable" method so we will have user interaction within each widget.
- Added Web Resources route so page was viewable. (testing functionality)
- Removed cohorts dropdown from side nav. Going with different UX to select cohorts and classes.