AMysql -> AMysql_Abstract
Support for changing the identifier char (borrowed from pgsql branch)
Merge branch 'attila2' into next

Conflicts:
	AMysql/Abstract.php
	AMysql/Statement.php
Hungarian comment to English
Deduplicated test methods
New functionality of AMysql_Exceptions for parsing the error msgs
Amended AMysql_Exception params system, and added tests