cdrtools.rb: adding a devel (3.01a24) alternative

Switched the stable alternative from tar.gz to tar.bz2 (since the "inside" tar archives have the exact same checksum).
Added a devel (3.01a24) alternative using an embedded patch carefully created from the one used for the stable release.
(I haven't tested the formula yet because I don't have OS X... Sorry). Thanks & kind regards.
There should only be one `stable`, etc block per formula, so merge them together.