Tentative refactoring.
Rename identation to indentation (huh.)
Small fixes (import exception, typo and use of splittext).
model_string replaced by function
Add 'tests' directory.
Use constants.INDENTATION.
Move tests/test_*.py to tests.py.

+ move tests/data to test_data.

(Because django doesn't like that tests/ directory.)
Fix imports and data path.
Don't assert a function against itself, you moron.
Unused import.
fix imports + forgot quotes in simple_field.
remove copy of template_test.yaml
Remove unused field_yaml_to_model.
Use closures instead of lambdas.
TextLine → CharField
Remove superfluous "models.".
checkboxes and radioboxes ain't the same shit, stupid mux.
Tentative (not tested) radiobox.
Raise exception when section in section.
Missing  \n and indentation.