STYLE: uniform 'Test-' prefix for all applications/test

- easier to clean, avoid confusion with 'real' applications, etc.

applications/test/triTet/Test-triTet.C

@@ -0,0 +1,40 @@
+#include "point.H"
+#include "triangle.H"
+#include "tetrahedron.H"
+#include "IOstreams.H"
+
+using namespace Foam;
+
+int main()
+{
+    triangle<point, point> tri
+    (
+        vector(0, 0, 0),
+        vector(1, 0, 0),
+        vector(1, 1, 0)
+    );
+
+    Info<< "tri circumCentre = " << tri.circumCentre() << endl;
+    Info<< "tri circumRadius = " << tri.circumRadius() << endl;
+
+    tetrahedron<point, point> tet
+    (
+        vector(1, 0, 0),
+        vector(0, 1, 0),
+        vector(0, 0, 1),
+        vector(0.5773502, 0.5773502, 0.5773502)
+    );
+
+    Info<< "tet circumCentre = " << tet.circumCentre() << endl;
+    Info<< "tet circumRadius = " << tet.circumRadius() << endl;
+
+    vector a(Sin);
+    vector b(Sin);
+    vector c(Sin);
+    vector d(Sin);
+
+    Info<< "tet circumRadius = "
+        << tetrahedron<point, point>(a, b, c, d).circumRadius() << endl;
+
+    return 0;
+}