Fix silly bug in glozz script
Fix FileId sorting
Tweak Glozz XML output order
Sort order we glozz-graph output order

For less confusing status reports
Standoff.sort_span
Fix regression in graphing of error nodes.

Error nodes are bits of the graph that arise from annotation errors.
I had accidentally excluded them by narrowing the is_edu (etc)
function in educe.stac.graph. To compensate, we need to actively seek
out nodes for which is_edu, is_cdu, is_relation fails
Graphing: not every node has a position

Error nodes in particular do not