vchoi_fork

[svn-r22282] Issue 7934 - The data sieve buffer size was for all the datasets in the file.  It 
      could waste memory if any dataset size is smaller than the sieve buffer
      size.  Now the library picks the smaller one between the dataset size
      and the sieve buffer size from the file access property. (There is no change
      to hl/ and fortran/ directories.  They were property changes during the merge
      from the trunk)

Tested on jam, koala, and ostrich.