[TYPO3-typo3org] updated sponsor banners (at Robert Lemke)

[Chris Kievid]

Robert,
At first i did not noticed you had used different sizes for the banner 
images. I have adjusted this, now all three banners have same size of 
135px by 45px. (the original size of punkt.de banner). So forget about 
the 2 previous versions I posted (which had a height of 42px and 48px), 
instead use these ones:

logo-sourceforge.gif > 
http://img2.uploadimages.net/782100logo-sourceforge.gif
logo-sunsitedk.gif > http://img2.uploadimages.net/389851logo-sunsitedk.gif

Let me know if other banners need to be made