specfile: clean %files, drop defattr macros
    
    - %defattr is not needed since Fedora 14
    - permissions are taken from installed files
      (removed chmod and added install where possible)
    - %attr was left only on places, where non-root owner is needed
    - removed slashes between: %{buildroot}%{_somedir}
    - files reordered by type
    - merged "%dir dir" and "dir/files*"