McIDAS, GEMPAK isMine() need to check file length
updated GribCollections doc
put cdmrFeature disk cache in standard place: cache/cmdr
 cdmrFeature basic filtering works
Merge remote-tracking branch 'origin/target-4.3.16' into target-4.3.16
added examples for new GribConfig options.
 cdmrFeature basic filtering (2)
Allow multiple closes on HTTPMethodStream.close()
Merge branch 'target-4.3.16' of https://github.com/Unidata/thredds into target-4.3.16
Added actual vertical levels in ncss grid as point csv responses.
Bug fixes in TimeDuration and GridAsPoint.