TagLib 1.9 features

[nikhilm]

TagLib 1.9 introduces some new things like hookable API for debug messages, improved refcounting and some improvements in PropertyMap. See whether this can be exposed via node-taglib. Especially see if the too many open files issue can be resolved.

[nikhilm]

Also, seems like WITH_MP4 and WITH_ASF checks/exposure is no longer strictly required, but should be kept for compat - http://mail.kde.org/pipermail/taglib-devel/2013-October/002543.html