add the examples colored_face which correpond to one example of the manual

local cgal_test has not been changed yet
suppressed a cin < in examples

Packages/Triangulation_2/examples/Triangulation_2/colored_face.C

@@ -0,0 +1,48 @@
+#include <CGAL/basic.h>
+#include <CGAL/Cartesian.h>
+#include <CGAL/IO/Color.h>
+#include <CGAL/Triangulation_euclidean_traits_2.h>
+#include <CGAL/Triangulation_default_data_structure_2.h>
+#include <CGAL/Triangulation_2.h>
+
+using namespace CGAL;
+using namespace std;
+
+/* A facet with a color member variable. */
+template < class Gt >
+class My_face_base : public Triangulation_face_base_2<Gt>
+{
+public:
+  Color color;
+  My_face_base() :
+    Triangulation_face_base_2<Gt>() {}
+  My_face_base(void* v0, void* v1, void* v2) : 
+    Triangulation_face_base_2<Gt>(v0,v1,v2) {}
+  My_face_base(void* v0, void* v1, void* v2, void* n0, void* n1, void* n2) : 
+    Triangulation_face_base_2<Gt>(v0,v1,v2,n0,n1,n2) {}
+};
+
+typedef Cartesian<double> Rp;
+typedef Triangulation_euclidean_traits_2<Rp> Gt;
+typedef Triangulation_vertex_base_2<Gt> Vb;
+typedef My_face_base<Gt> Fb;
+typedef Triangulation_default_data_structure_2<Gt,Vb,Fb > Tds;
+typedef Triangulation_2<Gt,Tds> Triangulation;
+typedef Triangulation::Face_handle Face_handle;
+typedef Triangulation::Face_iterator Face_iterator;
+typedef Triangulation::Vertex_handle Vertex_handle;
+typedef Point_2<Rp>  Point;
+
+int main() {
+    Triangulation t;
+    Point p;
+   
+    while (cin >> p){
+        t.insert(p);
+    }
+    Face_iterator fc = t.faces_begin();
+    while (fc != t.faces_end()) {
+	fc->color = BLUE;
+	++fc;
+    }
+}

Packages/Triangulation_2/examples/Triangulation_2/colored_face.cin

@@ -0,0 +1,4 @@
+0 1
+1 0
+0 0
+0.5 0.5

Packages/Triangulation_2/examples/Triangulation_2/example.C

@@ -160,7 +160,6 @@ void faces_along_line(Triangulation &T)
 {
     Point p(0.2, 0.6), q(0.7, 0.4);
 
-    cin >> p >> q;
     Face_handle f = T.locate(p);
     Line_face_circulator lfc = T.line_walk(p, q, f),
                          done(lfc);