File Release Notes and Changelog

This contrib package is API compatible (on 90%) with some interesting packages
from Oracle or PLVision library. There you can find:
* simply basic functions (next_day, last_day),
* bussiness calendar's functions based on PLVision's package plvdate.
* rich set of functions for string manipulation,
* interprocess communication support (dbms_alert and dbms_pipe).

New version contains more than one hundred functions with full support of multibyte encoding.