Moved favicons to /media/favicon (except for favicon.ico).
Removed prefixes from favicon names, and deleted duplicates.
Deleted apple-touch-icon-precomposed.png (useless on iOS <7 and unused on every other platform).
Added *~ to .gitignore.
Fixed typo.
Note that this no longer fixes a bug in mobile Safari in iOS 4.x/5.x. When the
user switches from portrait to landscape mode, the page will automatically be
zoomed in by the browser. However, users of all browsers can now zoom in.