add getValueOptional that reaches through the 'entries' tree to get entries with a given path
add getValueOptional that reaches through the 'entries' tree to get entries with a given path

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