Html5ui fa icons

Use font-awesome for:
    
- top of page icons: Print, RSS, SignIn/SignOut, Language, Help
- metadata links in metadata results page ie. download, add to map viewer etc
- metadata view icons: print, comment, tooltip, share, permalink
    
Mapping from protocol/mime-type to CSS classes (for metadata links) and metadata view icons to CSS classes (in metadata viewer) is now possible from html5ui/js/Settings.js

![reaults-with-fa-icons](https://cloud.githubusercontent.com/assets/1842016/2954072/1dac1834-da6b-11e3-9825-6f3d93e0848d.png)


![view-icons](https://cloud.githubusercontent.com/assets/1842016/2954052/9556452c-da6a-11e3-8b57-14be2edda546.png)