Merge develop release 2.2.4

ChangeLog

NEWS

app/cdi.c

configure.ac

examples/cdi_write_const.c

src/cdf_int.c

src/cdf_int.h

src/cdf_write.c

src/cdi.h

src/cdi_datetime.c

src/dmemory.h

src/grid.c

src/stream.c

src/stream_cdf_i.c

src/stream_gribapi.c

src/stream_record.c

src/vlist_var.c

src/zaxis.c