/*!

\page free_faces_page Free faces

\n This mesh quality control highlights the faces connected
less than to two mesh volume elements. The free faces are shown with a
color different from the color of shared faces.

\image html free_faces.png
<center>In this picture some volume mesh elements have been, as
a result some faces became connected only to one
volume. i.e. became free.

<br><b>See Also</b> a sample TUI Script of a 
\ref tui_free_faces "Free Faces quality control" operation.  

*/