Visitor process.
Visitor process test.
Starting the export module.
Visiting Elements only; minor style changes in cool example
Adding functions export for DOT; Refactoring DotExport code.
Styling
Docstrings update and small refactoring.
Export documentation.
Python3 fixes
Adding tests for the export
Finishing export tests
Adding DOT tests
Fixing special chars in condition labels
Python3 support
ExportProcess docs, minor styling.
DOT export docs.
Proofreading and minor style changes.