Symlink /dev/.udev to /run/udev for new udev

The version of udev on raring and later uses `/run/udev` instead of
`/dev/.udev`.

Fixes #110
Better linking of /dev/.udev to /run/udev

Use -T to replace /run/udev symlink rather than mistakenly treating it
as a directory, and avoid deferencing symlink with fixabslinks
Merge pull request #113 from smibarber/master

Fix for udev /run/udev in raring