Added the new metal2 material and the Fresnelcolor Texture which you need to load in metal2 to work. You will need a much latest Luxrender build to use it
Added an option in the material preview to set the preview render time on your own. When you set your own time the preview doesnt take into account the Quality drop down list. Also changed the fresnelcolor name color->kr to correspond with the changes made 3 hours ago. ( Obviously i havent tested them yet )