/*!

\page free_faces_page Free faces

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

\image html free_faces.png
<center>In this picture some volume mesh element are removed as
a result some faces become connected only to one
volume. i.e. become free.

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

*/