Fixed to use staticmethod, make_hex_points.
Fixed to use staticmethod, make_hex_points.

Fixed
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* Static mehtod, make_hex_points, does not operate on self.

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