pysql revival

Pysql dev is restarted after some month of happy hacking of other projet.

A snapshot preview is available here :
https://sourceforge.net/project/showfiles.php?group_id=211236&package_id=253791&release_id=647166

Most significant changes for now are a new parser (mostly used for graphics functions), better and cleaner unicode and database encoding handling. And some bug squashing of course.

Detailed changelog of this preview release can be found here :
https://sourceforge.net/project/shownotes.php?release_id=647166&group_id=211236