added new service refs for 3 channels

1_0_19_F47_7F7_2_11A0000_0_0_0.png -> skymoviesshowcasehduk.png
1_0_19_F4C_7F2_2_11A0000_0_0_0.png -> discoveryhd.png
1_0_19_F4D_7D5_2_11A0000_0_0_0.png -> skysportsnewshduk.png
Merge pull request #178 from gazhay/master

added new service refs for 3 channels