Planning releases of libcdio language bindings

[r-]

greenleon has graciously updated all of the libcdio language bindings
(Perl, Python, Ruby) for the new CD-Text API while still tolerating the old
API for older libcdio versions. I am still slowly making my way through the
updates.

The plan is to release the language bindings in advance of the next general
libcdio release with the CD-Text improvements.