fracture_grid.py now uses tuples for coordinates
fracture_grid.py now uses tuples for coordinates

RondaStrauch/landlab,landlab/landlab,cmshobe/landlab,Carralex/landlab,amandersillinois/landlab,SiccarPoint/landlab,landlab/landlab,csherwood-usgs/landlab,cmshobe/landlab,ManuSchmi88/landlab,ManuSchmi88/landlab,laijingtao/landlab,Carralex/landlab,RondaStrauch/landlab,cmshobe/landlab,ManuSchmi88/landlab,laijingtao/landlab,landlab/landlab,SiccarPoint/landlab,csherwood-usgs/landlab,Carralex/landlab,RondaStrauch/landlab,amandersillinois/landlab