Correct links for OpenMapSurfer layers

[Rungee]

At the moment ip address-based links are used. These links contain nonstandard ports, which can be sometimes blocked by a firewall.
Please correct all used links according to the table below:

OSM Roads layer:
URL: http://openmapsurfer.uni-hd.de/tiles/roads/x={x}&y={y}&z={z}
instead http://129.206.74.245:8001/tms_r.ashx?x={x}&y={y}&z={z}
OSM Semitransparent layer:
URL: http://openmapsurfer.uni-hd.de/tiles/hybrid/x={x}&y={y}&z={z}
instead http://129.206.74.245:8003/tms_h.ashx?x={x}&y={y}&z={z}
ASTER GDEM & SRTM Hillshade layer:
URL: http://openmapsurfer.uni-hd.de/tiles/asterh/
instead http://129.206.74.245:8004/tms_hs.ashx?x={x}&y={y}&z={z}
ASTER GDEM contour lines layer:
URL: http://openmapsurfer.uni-hd.de/tiles/asterc/
instead http://129.206.74.245:8006/tms_il.ashx?x={x}&y={y}&z={z}
OSM Administrative Boundaries layer:
URL: http://openmapsurfer.uni-hd.de/tiles/adminb/
instead http://129.206.74.245:8007/tms_b.ashx?x={x}&y={y}&z={z}
OSM Roads Grayscale Layer:
URL: http://openmapsurfer.uni-hd.de/tiles/roadsg/
instead http://129.206.74.245:8008/tms_rg.ashx?x={x}&y={y}&z={z}

[brunob]

Pull request provided, thanks for the hint @Rungee :)

[jieter]

@Rungee you might want to remove those ip-urls from the info page too...