xml_dom.py: Added minidom.Document write_opening() and write_closing() methods. Changed writexml(writer, node) to use new Node.writeprettyxml() method.

Renamed ex.py to exc.py

Import xml.dom.minidom as minidom

xml_dom.py: Refactored xml.dom.minidom.Element.writexml() to use new write_opening() and write_closing() methods. Use new functions is_elem() and is_text_node() to determine node type. Corrected definition of a text element to be an element that contains a single text node.

bin/map: Factored out input processing code

Commit after inserting each row

Commit after inserting each row

Use traceback.print_exc() to print Exceptions for each row instead of exiting

env_password: Allow user to change saved password

env_password: Don't print instructions for storing password for the session if called to store password for the session