Relicense libapetag and vcedit.c to GPLv2+

Invoke Section 3 of the LGPL, and apply the terms of the GPL to all the
LGPL portions of code inside EasyTAG, which include the APE tag reading
code (libapetag) and the Vorbis comment parsing code (vcedit.c).
Fix memory leak in CDDB dialog error path
Fix a memory leak when saving an Ogg file
Fix memory leak when loading a Speex file