searchableSurface: Renamed geometry directory triSurface -> geometry

Originally the only supported geometry specification were triangulated surfaces,
hence the name of the directory: constant/triSurface, however now that other
surface specifications are supported and provided it is much more logical that
the directory is named accordingly: constant/geometry.  All tutorial and
template cases have been updated.

Note that backward compatibility is provided such that if the constant/geometry
directory does not exist but constant/triSurface does then the geometry files
are read from there.

tutorials/mesh/foamyHexMesh/simpleShapes/Allclean

@@ -5,8 +5,8 @@ cd ${0%/*} || exit 1    # Run from this directory
 . $WM_PROJECT_DIR/bin/tools/CleanFunctions
 
 rm -r constant/extendedFeatureEdgeMesh constant/internalDelaunayVertices > /dev/null 2>&1
-rm constant/triSurface/*.eMesh > /dev/null 2>&1
-rm constant/triSurface/*_orient* > /dev/null 2>&1
+rm constant/geometry/*.eMesh > /dev/null 2>&1
+rm constant/geometry/*_orient* > /dev/null 2>&1
 rm -r constant/polyMesh > /dev/null 2>&1
 rm -r constant/polyMesh > /dev/null 2>&1
 rm -r constant/tetDualMesh > /dev/null 2>&1

tutorials/mesh/foamyHexMesh/simpleShapes/Allrun

@@ -5,19 +5,19 @@ cd ${0%/*} || exit 1    # Run from this directory
 . $WM_PROJECT_DIR/bin/tools/RunFunctions
 
 runApplication -s cone \
-    surfaceOrient constant/triSurface/cone.stl \
-                  constant/triSurface/cone_orient.stl \
+    surfaceOrient constant/geometry/cone.stl \
+                  constant/geometry/cone_orient.stl \
                   -inside '(0 -0.5 0)'
 
 runApplication -s sphere \
-    surfaceOrient constant/triSurface/sphere.stl \
-                  constant/triSurface/sphere_orient.stl \
+    surfaceOrient constant/geometry/sphere.stl \
+                  constant/geometry/sphere_orient.stl \
                   -inside '(0 -0.5 0)'
 
 runApplication \
     surfaceBooleanFeatures \
-                  constant/triSurface/cone_orient.stl \
-                  constant/triSurface/sphere_orient.stl \
+                  constant/geometry/cone_orient.stl \
+                  constant/geometry/sphere_orient.stl \
                   intersection
 
 runApplication foamyHexMesh