Moved buffers to Utility

Fixed NzVector4::operator/
Replaced enumName_Count by enumName_Max
Renamed (Index/Vertex)Buffer::GetBufferPtr by GetPointer

include/Nazara/Renderer/Shader.hpp

@@ -30,7 +30,7 @@ enum nzShaderType
 	nzShaderType_Geometry,
 	nzShaderType_Vertex,
 
-	nzShaderType_Count
+	nzShaderType_Max = nzShaderType_Vertex
 };
 
 class NzRenderer;