first version of an XMLContentHandler, also support relative imports for librarypath
implement support for subparsers
add XMLContentHandler to testsuite
fix method calls
add support for unicode input
add some empty strings to tests (some libraries return None)
fix parsing of empty values
refactor dictionary unmarshalling, use iterfind instead of findall
add module-level IS_PYTHON3 variable
convert text to unicode if we're not on python3
decode bytes as input
make XMLContentHandler python3 compatible
update documentation
correct returntype for marshal_str
add linktexts to see-also links
rename 'YamlContentHandler' to 'YAMLContentHandler' for consistency
update ChangeLog
add the IS_PYTHON2 variable
use IS_PYTHON2 and IS_PYTHON3 for py2/py3 specific code
add python-version specific methods for YAMLContentEncoder