Dear Guix,

I would like to update 'vcftools' to 0.1.14 (the latest release).
The project now uses Autotools, so the configure phase should be run.
In addition to that, I had to run autogen.sh to generate a configure
script.

They moved from Sourceforge to Github, so I updated the source link and
the homepage to Github.

Kind regards,
Roel Janssen