Comment 10 for bug 278423

Fixed the "Sequential Labels". This error was due to a change to the LXML parser, which no longer accepts colons in the XML describing the shape.

Also added support for arbitrary Unicode alphabets. I have already included upper and lowercase Cyrillic and Greek, and Hebrew. To add more, simply add an entry in the .inx file for that alphabet, and add a corresponding alphabet in the .py script under "set_alphabet()". Everything else, including length, is handled automatically.