Method get_annotations_for_tier updated to a empty string with/without unicode. Method _get_elements_for_tier parent_element fixed.
Test_pickle updated to latest parser.
Files updated to latest graf version.
Exception added to method root_nodes.
Tests updated.
Regex import removed-
Regex import removed.
elan2html updated to work with the turkish example.
AnnotationGraph method as_html_table fixed the unicode variables.
unicode_literals import added.