Expanded embedded help

Added/changed the following:

- Introjs for data, users, groups, and roles pages
- Help tooltips for data, users, groups, and roles pages
- Auto-transition introjs tour to next sub-page (e.g. end of tour on users automatically goes to groups)
- Changed jsonp request for json from s3 to cors request ($http.jsonp -> $http.get)
- Updated tabs css to accomodate tooltips on users pages (reassigned class from a to div)