compact view: give link urls "may-blank" css class

makes external links open in a new window when the user preference is enabled,
like non-compact view

Closes #1160.
Allow admins to access deleted user pages by name
Add body property to Link

This is mostly for convenience, since there are quite a few places where
we need to do a check similar to:

    if isinstance(item, Comment):

to determine whether the item's "text" will be in .body or .selftext.
This will allow us to just always use .body regardless of type.
Update nonrevenue status list for gold