Fix issue of shouting error when removing a node. - It shout a Python traceback message when removing a node that is referenced by a svg:use node. - when the node been removed, the node would be duplicated. The duplication was used to replace the svg:use one. - The ID of inserted duplication is the same as duplicated node, and modified to a new and unique ID. - Original design of domview_monitor can not handle it. - It is resolved by changing domview_monitor._id2node from single mapping to multiple mapping one.

# -*- indent-tabs-mode: t; tab-width: 8; c-basic-offset: 4; -*-
# vim: sw=4:ts=8:sts=4
m4datadir = $(datadir)/mb
dist_m4data_DATA = foreach.m4 mb_c_header.m4 mb_c_source.m4
dist_bin_SCRIPTS = svg2code.py