NOJIRA:  Added gcc dependency to Travis config to try and fix node 4 builds.
NOJIRA:  Added gcc dependency to Travis config to try and fix node 4 builds.

GPII/gpii-handlebars,the-t-in-rtf/gpii-handlebars,the-t-in-rtf/gpii-handlebars,GPII/gpii-handlebars