Updating to SCORPIO v1.9.1

SCORPIO v1.9.1 includes many fixes related to data compression,

* Fixed issues with multiple redef/enddef calls with HDF5
* Manual datatype conversion, as needed, for HDF5 output
* Fix typos for ADIOS+ZFP compression rate
* Disable HDF5+ZFP compression for scalars and 5D+ variables
  and variables with only unlimited dimensions
* Adding related tests
* put_vars_* support for CDF5 types when using PnetCDF

Author: jayeshkrishna