changes new graf elan and graf modules.
Tests to elan module added.
Tests to graf module added.
GrafConverted updated.
Elan parser updated.
Elan parser updated.
Method from_elan updated and method _generate_metafile updated.
Tests updated.
Graf module updated. Tier object changed, linguistic_typed added. AnnotationSpaces adding fixed. _add_node updated.
ELan parsed module updated.
Elan parser updated. Elan class Writer method write fixed and updated.
Regions added.
Annotation name fixed.
Module updated.
Test added and passing.
New tests added.
Script updated.
Script updated.
Annotation value in _add_graf_annotation updated.
Methods from_elan and from_typecraft updated.