boostorg/geometry — pull request #81 by mkaravel (2014-07-02 08:35:28+00:00)
Title: Feature/is simple

1. Fix polygon WKT in is_valid example (one of the interior rings was having the wrong orientation)
2. Add images to is_valid and is_simple documentation
3. Add the polygon used in the is_valid example to the is_valid unit test