vchoi_fork

[svn-r1277] Added additional checks into the dataspace code to determine if the hyperslabs
being written out are contiguous in memory and on disk and write/read them as
one I/O operation (if the datatypes don't require conversion).  This should be
a good performance boost for those situations.  It's especially needed on the
ASCI Red (TFlops) machine.  - QAK (from Albert's account on modi4 :-)