- Add the 'steam' substance and its class, if97.
- Added new functionality to reg.__baseclass__._vectorize()
- Corrected inconsistent capitalization p/P usage across classes. Lower case p
is now used for pressure in all classes. This may cause reverse
compatibility issues between 1.1 and 1.2 if your code calls out P in its
arguments.
- Corrected a bug in psolve() caused by the same inconsistency
- Changed the "def_T" configuration parameter to 300. Some species' data are not
defined below 300, so the default of 298.15 caused an error.
- Corrected all IG pressure references to be 1 bar instead of 1 atm to be
consistent with the source JANAF reference data.
- Replaced def_P with def_p to be consistent with the lower case pressure
definition.