added stringer url to user agent when fetching feeds
added stringer url to user agent when fetching feeds

jeroenj/stringer,milligramme/stringer,dperson/stringer,milandobrota/stringer,milligramme/stringer,dandorman/stringer,thiagosil/stringer,jeroenj/stringer,mpraglowski/stringer,lodestone/stringer,thiagosil/stringer,Koronen/stringer,milandobrota/stringer,swanson/stringer,adscott/stringer,nobuti/stringer,dandorman/stringer,jeroenj/stringer,lodestone/stringer,nobuti/stringer,Koronen/stringer,InPermutation/stringer,mpraglowski/stringer,swanson/stringer,dperson/stringer,run-project/stringer,mpraglowski/stringer,run-project/stringer,milligramme/stringer,dperson/stringer,adscott/stringer,dandorman/stringer,milandobrota/stringer,jqr/stringer,InPermutation/stringer,Koronen/stringer,jqr/stringer,bkbabydp/stringer,nibble/stringer,run-project/stringer,geemus/stringer,nibble/stringer,bkbabydp/stringer,nobuti/stringer,geemus/stringer,adscott/stringer,Koronen/stringer,wwwjfy/stringer,geemus/stringer,InPermutation/stringer,lodestone/stringer,nibble/stringer,dperson/stringer,wwwjfy/stringer,adscott/stringer,jeroenj/stringer,jqr/stringer,thiagosil/stringer,swanson/stringer,nibble/stringer,swanson/stringer,jqr/stringer,geemus/stringer