Update to 1.61
    
    - Update to 1.61 (see Changes for details)
    - Specify all dependencies
    - Package CONTRIBUTORS file
    - Recode documentation as UTF-8
    - Remove spurious exec permission from perl module file
    - Drop %defattr, redundant since rpm 4.4
    - Make %files list more explicit
    - Drop redundant %{?perl_default_filter}
    - Don't need to remove empty directories from the buildroot
    - Don't use macros for commands