Update grunt-fontello.
Update grunt-fontello.

I was getting failure messages from npm when it ran the fontello task.  This appears to correct it.

jbeezley/girder,Kitware/girder,Kitware/girder,Xarthisius/girder,data-exp-lab/girder,adsorensen/girder,RafaelPalomar/girder,kotfic/girder,Xarthisius/girder,jbeezley/girder,manthey/girder,Xarthisius/girder,sutartmelson/girder,adsorensen/girder,Kitware/girder,sutartmelson/girder,sutartmelson/girder,girder/girder,Xarthisius/girder,girder/girder,manthey/girder,Xarthisius/girder,RafaelPalomar/girder,RafaelPalomar/girder,adsorensen/girder,data-exp-lab/girder,RafaelPalomar/girder,Kitware/girder,RafaelPalomar/girder,kotfic/girder,data-exp-lab/girder,kotfic/girder,manthey/girder,jbeezley/girder,adsorensen/girder,girder/girder,kotfic/girder,kotfic/girder,sutartmelson/girder,adsorensen/girder,manthey/girder,data-exp-lab/girder,data-exp-lab/girder,sutartmelson/girder,jbeezley/girder,girder/girder