hdf5_msb

[svn-r10674] Purpose:
	New feature.

Description:
	The scaleoffset filter has been implemented to
	to compress floating-point data (single precision
	and double precision) using D-scale method from
	GRIB.

Solution:
	Test cases for float and double datatypes are added
	according to the change of scaleoffset filter. Situations
	of fill value defined/undefined are tested.

Platforms tested:
	heping, shanti, copper

Misc. update: