Changes
DBSchema.pm
-DBSchema/ColGroup.pm
-DBSchema/ColGroup/Index.pm
-DBSchema/ColGroup/Unique.pm
DBSchema/Column.pm
DBSchema/DBD.pm
DBSchema/DBD/Oracle.pm
DBSchema/DBD/SQLite.pm
DBSchema/DBD/Sybase.pm
DBSchema/DBD/mysql.pm
+DBSchema/ForeignKey.pm
DBSchema/Index.pm
DBSchema/Table.pm
DBSchema/_util.pm