Various UI updates as requested by committee

This commit includes several front-end changes:

- Removing the default table of results on the homepage
- Moving links/resources to the second spot on the homepage
- Updating the links and providing a more graphical look for these
- Progressively enhancing the drop-down with a text field using auto-complete for the courses list on the homepage
- Adding a new page for how to use the resource (user guide) and linking this from the homepage and main navigation
- Increasing the readability of the legal terms for the upload form (appearance only for now)
- Changing the wording/labels as requested or suggested for the upload form (including exam types)
- Adding tooltips to explain the unclear fields for the upload form and homepage
- Adding an external JavaScript file
- Updating instructional text for instructors