hdf5_msb

[svn-r9894] Purpose:
Tests modification and improvements of nbit filter.

Description:
Add dynamic allocation of array storing nbit parameters and check if
the number of parameters exceeds what cd_values[] can store; change
function prototypes to improve poratability; minor modification to
improve efficiency of the nbit algorithm.

Platforms tested:
AIX 5.1 and Linux 2.4.

Misc. update: