Screen 2 Completed and Committed changes

In Js folder - jquery bootstrap plugin for duallistbox is added, custom
settings for the listbox in separate js file.
In css folder - style for bootstrap dual listbox is added
2-old.html - this has the dual listbox created from scratch but no
search functionality
2.html - is the latest file for the second screen created with the
plugin
index.html - minor changes concerned with visibility of a button