Add slot for media partner

[vvojvoda]

Text: "Glavni medijski partner" Place between standard and supporter

[niksy]

• Main media sponsor should be larger than other media sponsors
• Main media sponsor should have text below which explains that they are "The Big Kahuna"
• Media sponsors should be parallel (i.e. on same line)

[ihabunek]

• main media sponsor - size similar to standard sponsor
• other media sponsors - size similar to supporter

[niksy]

Done.