minimal Unity shader, to use vertex colors without lighting or texture

vertexColor.shader

// taken from http://answers.unity3d.com/questions/391561/create-a-mesh-and-color-cubes.html
Shader "Custom/Vertex Colored"
  {
  Properties
    {
    }
  SubShader
    {
    Pass
      {
      ColorMaterial AmbientAndDiffuse
      }
    } 
 }