Removing obspy.core.util.xmlwrapper
xpath() and namespace handling now uses lxml
Temporary workaround for xml string comparison.
More adjusted tests
Fixing quakeml docstrings
Forcing XML encoding and the declaration.
Compatibility for Py3k.
Better xml string comparision. Still not really good
Typo
XML string comparision using c14n
Merge pull request #843 from krischer/xml_refactoring

AttributeError: _ElementInterface instance has no attribute 'nsmap'