added matplotlib to install dependencies
added matplotlib to install dependencies

UManPychron/pychron,USGSDenverPychron/pychron,USGSDenverPychron/pychron,NMGRL/pychron,UManPychron/pychron,NMGRL/pychron,USGSDenverPychron/pychron,USGSDenverPychron/pychron,UManPychron/pychron,NMGRL/pychron,NMGRL/pychron,UManPychron/pychron