Updates to public aggregation views, favicon.ico fix, and CSS caching added

- Public aggregation views
   - Cleaned HTML to HTML5, move to CSS3, reduce javascript, etc..
   - Remaining old-style tabs (map search) changed to new CSS ones
   - Share pop-up form is now created in javascript (performance gain)
- If a top-level favicon.ico does not exist, it looks in /design/favicons/hostname/ for one
- The Non-IE CSS hack is now loaded into the application cache (performance gain)
- Corrected an issue with metadata browsing affecting some collections