Update promotion default design models.
    
        - Use CentOS release brands from revision 358.
    
        - Remove shadow from all media texts except big release number in
          sleeves' front face. The shadow blur in big relese number is set
          to 2.5. The 2.5 blur definition was applied to =RELEASE=
          translation marker.
    
        - Reduce font size from 12 to 10 points in copyright, license, and
          url information on sleeves' back face. Otherwise the Spanish
          translation overlaps the area of sleeve's back face.
    
        - Reduce font size from 14 to 12 points in ``What is CentOS?''
          description body. This helps to keep some space between body
          text and CentOS symbol on bottom.
    
        - Rearrange cd labels design.
    
        - Inside cd labels, both CentOS symbol and CentOS release brand
          are 15 mm height. Width is calculated automatically to fit image
          ratio.