Preparation for GnuTLS support
Merge branch 'master' into gnutls
Preparation for GnuTLS backend

I added the necessary lines to the autotools files. Maybe someone
else should look into this as it seems to me like its currently
more of a dirty hack. I works though.
Merge branch 'gnutls' of github.com:fmorgner/umurmur into gnutls
Merge branch 'master' into gnutls
Merge branch 'gnutls' into ipv6