staging/skein: rename files and clean up directory structure

Clean up file names and locations.  Get rid of include/ directory and move
those up to the top-level.  Rename files to get rid of upper case.  Remove
skeinBlockNo3F.c as it was unused (temporary file or something?).

Signed-off-by: Jake Edge <jake@lwn.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>