* Synchronized type constants with SWI-Prolog.h
update for broken compatibility changes in SWI-Prolog.h up to 0.8.3.
* Fix incorrect REP_* constants.
* Fixed issue [92](https://github.com/yuce/pyswip/issues/92) (C assert)
* Fixed issue [90](https://github.com/yuce/pyswip/issues/90) (quoted string)
* Fixed Variables in foreign functions not unifiable. Contributed by Michael Kasch.
* Added support multibyte strings and atoms. Contributed by Nikolai Merinov.
* Updated core.py and easy.py for unifying strings properly. Contributed by rohanshekhar.
* Fixed issue [71](https://github.com/yuce/pyswip/issues/71). Contributed by prologrules.
* Fixed compatibility with SWI-Prolog 8.2.0. Contributed by Stuart Reynolds.
* Fixed compatibility with MacOS. Contributed by prologrules and Dylan Lukes.