add default option for capacity, fix copy/paste error of dimension creation
add default option for capacity, fix copy/paste error of dimension creation

mpgerlek/PDAL-old,Sciumo/PDAL,Sciumo/PDAL,verma/PDAL,boundlessgeo/PDAL,boundlessgeo/PDAL,jwomeara/PDAL,mtCarto/PDAL,DougFirErickson/PDAL,mpgerlek/PDAL-old,mtCarto/PDAL,radiantbluetechnologies/PDAL,radiantbluetechnologies/PDAL,mtCarto/PDAL,lucadelu/PDAL,verma/PDAL,jwomeara/PDAL,jwomeara/PDAL,radiantbluetechnologies/PDAL,Sciumo/PDAL,mpgerlek/PDAL-old,lucadelu/PDAL,lucadelu/PDAL,verma/PDAL,verma/PDAL,boundlessgeo/PDAL,mpgerlek/PDAL-old,radiantbluetechnologies/PDAL,mtCarto/PDAL,lucadelu/PDAL,jwomeara/PDAL,verma/PDAL,Sciumo/PDAL,verma/PDAL,DougFirErickson/PDAL,DougFirErickson/PDAL,boundlessgeo/PDAL,verma/PDAL,DougFirErickson/PDAL