[Namespaces changes]

vert->vertex 

clean up of some namespaces to comply the following naming:

Complexes (3 letters namespaces):
order 0 (point cloud    ) :vrt
order 1 (edge meshes)     :edg
order 2 (triangle meshes) :tri
order 3 (triangle meshes) :tet

Simplexes (4 letters namespaces):
order 0 (vertex)      :vert 
order 1 (edge)        :edge 
order 2 (triangle)    :triangle
order 3 (tetrahedron) :tetrahedron

vcg/simplex/vertexplus/component.h

@@ -122,7 +122,7 @@ First working version!
 #include <vcg/space/color4.h>
 
 namespace vcg {
-  namespace vert {
+  namespace vertex {
 /*
 Some naming Rules
 All the Components that can be added to a vertex should be defined in the namespace vert:
@@ -333,7 +333,7 @@ private:
   ColorType _color;    
 };
 
-template <class TT> class Color4b: public vert::Color<vcg::Color4b, TT> {
+template <class TT> class Color4b: public Color<vcg::Color4b, TT> {
 	public: static void Name(std::vector<std::string> & name){name.push_back(std::string("Color4b"));TT::Name(name);}
 };