switch to git-provided salt for now, EPEL version has fatal bug in npm module.
switch to git-provided salt for now, EPEL version has fatal bug in npm module.

thehunmonkgroup/unhangout-installer,thehunmonkgroup/unhangout-installer,unhangout/unhangout-installer,unhangout/unhangout-installer,thehunmonkgroup/unhangout-installer,unhangout/unhangout-installer