Add small info on visualization options

Author: orbingol

README.rst

@@ -19,6 +19,15 @@ Input Files
 respectively. Please see the `NURBS-Python repository <https://github.com/orbingol/NURBS-Python>`_  on details of the
 file formats.
 
+Visualization
+-------------
+
+The examples ``curve2d/ex_curve01.py`` and ``curve3d/ex_curve3d01.py`` illustrates usage of the optional visualization
+component which comes with the NURBS-Python package.
+
+More advanced visualization options and some example figures with the instructions on how to generate them can be
+found under ``visualization/`` directory.
+
 Author
 ======