xml_dom.py: minidom modifications: Escape as many text strings as we use directly. This still leaves the tagName used by xml.dom.minidom.Element.writexml: It uses 'writer.write(indent+"<" + self.tagName)' and doesn't escape the tagName.

xml_func.py: Made everything Unicode-safe by using strings.ustr instead of str

schemas/tree_cross-links.sql: Added comment for how to get the namedplace trigger from the provided plantname trigger

vegbien.sql: Fixed bug in tree cross-link algorithm where recursion to descendants' ancestors did not use new to refer to the current node's plantname_id

vegbien.sql: Fixed bug in tree cross-link algorithm to also insert ancestors for top-level nodes, because they now need an ancestor entry for themselves

Added separate SQL file for tree cross-links code. A link to this can be e-mailed to people to review.

vegbien.sql: Modified tree cross-link algorithm to add an "ancestor" for this node. This is useful for queries, because you don't have to separately test if the leaf node is the one you're looking for, in addition to that leaf node's ancestors.

README.TXT: Added instructions how to stop all running imports

vegbien.sql: Added namedplace_update_ancestors and plantname_update_ancestors triggers to populate ancestor cross-links in new namedplace_ancestor and plantname_ancestor tables

sql.py: insert() (and try_insert()): Added optional returning param to provide name of an inserted column (usually pkey) to return