Add gcf installation.
Add gcf installation.

gcf is installed in /usr/share/geni-portal after download from the
internal web server. SFA log files are touched and chmodded to 777 to
allow the www-data user to update them. The gcf config directory
(gcf.d) is copied from the distribution to /usr/share/geni-portal as
well.

tcmitchell/geni-portal,charliemeyer/geni-portal,tcmitchell/geni-portal,charliemeyer/geni-portal,charliemeyer/geni-portal,tcmitchell/geni-portal,tcmitchell/geni-portal,charliemeyer/geni-portal,tcmitchell/geni-portal,charliemeyer/geni-portal