soda: 1.availability has count of dir entries 2.preliminary WebDav support; vlkb-obscore: surveys->datasets, csv.restfreq=0 inserts NULL, HGBS survey csv-metada added
soda: 1.availability has count of dir entries 2.preliminary WebDav support; vlkb-obscore: surveys->datasets, csv.restfreq=0 inserts NULL, HGBS survey csv-metada added