date update + version increase to 0.7.0
date update + version increase to 0.7.0

jread-usgs/gsplot,lindsaycarr/gsplot,ldecicco-USGS/gsplot,USGS-R/gsplot,ldecicco-USGS/gsplot,dpattermann-usgs/gsplot,lindsaycarr/gsplot,jread-usgs/gsplot,dpattermann-usgs/gsplot