Update contributors.xml for 1.5.2
Update contributors.xml for 1.5.2

stsundermann/banshee,arfbtwn/banshee,Dynalon/banshee-osx,dufoli/banshee,babycaseny/banshee,Carbenium/banshee,mono-soc-2011/banshee,GNOME/banshee,mono-soc-2011/banshee,GNOME/banshee,stsundermann/banshee,Dynalon/banshee-osx,babycaseny/banshee,ixfalia/banshee,babycaseny/banshee,stsundermann/banshee,Dynalon/banshee-osx,lamalex/Banshee,Carbenium/banshee,GNOME/banshee,dufoli/banshee,GNOME/banshee,GNOME/banshee,ixfalia/banshee,directhex/banshee-hacks,babycaseny/banshee,dufoli/banshee,allquixotic/banshee-gst-sharp-work,Dynalon/banshee-osx,ixfalia/banshee,stsundermann/banshee,stsundermann/banshee,babycaseny/banshee,ixfalia/banshee,babycaseny/banshee,arfbtwn/banshee,stsundermann/banshee,directhex/banshee-hacks,allquixotic/banshee-gst-sharp-work,ixfalia/banshee,petejohanson/banshee,arfbtwn/banshee,GNOME/banshee,petejohanson/banshee,mono-soc-2011/banshee,lamalex/Banshee,Carbenium/banshee,Dynalon/banshee-osx,stsundermann/banshee,dufoli/banshee,mono-soc-2011/banshee,dufoli/banshee,allquixotic/banshee-gst-sharp-work,allquixotic/banshee-gst-sharp-work,dufoli/banshee,mono-soc-2011/banshee,petejohanson/banshee,directhex/banshee-hacks,directhex/banshee-hacks,stsundermann/banshee,dufoli/banshee,directhex/banshee-hacks,petejohanson/banshee,mono-soc-2011/banshee,Carbenium/banshee,arfbtwn/banshee,Dynalon/banshee-osx,GNOME/banshee,Carbenium/banshee,allquixotic/banshee-gst-sharp-work,directhex/banshee-hacks,ixfalia/banshee,ixfalia/banshee,allquixotic/banshee-gst-sharp-work,babycaseny/banshee,dufoli/banshee,arfbtwn/banshee,arfbtwn/banshee,Carbenium/banshee,arfbtwn/banshee,arfbtwn/banshee,ixfalia/banshee,lamalex/Banshee,lamalex/Banshee,petejohanson/banshee,lamalex/Banshee,petejohanson/banshee,babycaseny/banshee,Dynalon/banshee-osx,lamalex/Banshee,mono-soc-2011/banshee,GNOME/banshee,Dynalon/banshee-osx