1. Adding multiselect dependency to bower.json

2. Initial setup multiselect-dropdown HTML, CSS and JS
Setup multiselect HTML; Included
../components/bootstrap/dist/js/bootstrap.min.js. Copied
bootstrap-multiselect.less into working /less folder.
Updated JavaScript initialization to setup multiselect's width,
container CSS and button CSS.

3. Multiselect: move javascript to rcue-util.js and HTML to dropdowns.html