* GUILE-VERSION (GUILE_MINOR_VERSION): bump for new unstable.
(GUILE_MICRO_VERSION): reset for new unstable.
(LIBGUILE_INTERFACE_CURRENT): use libtool versioning scheme.
(LIBGUILE_INTERFACE_REVISION): use libtool versioning scheme.
(LIBGUILE_INTERFACE_AGE): use libtool versioning scheme.
(LIBGUILE_INTERFACE): use libtool versioning scheme.
(LIBGUILEQTHREADS_INTERFACE_CURRENT): use libtool versioning scheme.
(LIBGUILEQTHREADS_INTERFACE_REVISION): use libtool versioning scheme.
(LIBGUILEQTHREADS_INTERFACE_AGE): use libtool versioning scheme.
(LIBGUILEQTHREADS_INTERFACE): use libtool versioning scheme.