Merge branch 'hotfix/0.20.1' - fix for sphinx autodoc generation of xmlmap fields
bump version to 0.20.2
clean up unused namespaces before serializing
add root names to ead xmlmap objects, to allow using eadmap to add/update existing xml
document changes in 0.20.2
Merge branch 'hotfix/0.20.2' into develop

Conflicts:
	eulxml/__init__.py