Added script to sign release artifacts (#592)
Added script to sign release artifacts (#592)


merlimat/pulsar,sschepens/pulsar,nkurihar/pulsar,sschepens/pulsar,saandrews/pulsar,merlimat/pulsar,saandrews/pulsar,yush1ga/pulsar,merlimat/pulsar,tkb77/pulsar,nkurihar/pulsar,nkurihar/pulsar,massakam/pulsar,jai1/pulsar,sschepens/pulsar,saandrews/pulsar,massakam/pulsar,ArvinDevel/incubator-pulsar,tkb77/pulsar,yush1ga/pulsar,sschepens/pulsar,massakam/pulsar,saandrews/pulsar,yahoo/pulsar,jai1/pulsar,ArvinDevel/incubator-pulsar,jai1/pulsar,tkb77/pulsar,massakam/pulsar,ArvinDevel/incubator-pulsar,nkurihar/pulsar,nkurihar/pulsar,sschepens/pulsar,sschepens/pulsar,nkurihar/pulsar,nkurihar/pulsar,yush1ga/pulsar,ArvinDevel/incubator-pulsar,yahoo/pulsar,ArvinDevel/incubator-pulsar,yush1ga/pulsar,yush1ga/pulsar,saandrews/pulsar,yahoo/pulsar,massakam/pulsar,tkb77/pulsar,jai1/pulsar,merlimat/pulsar,ArvinDevel/incubator-pulsar,nkurihar/pulsar,yush1ga/pulsar,yush1ga/pulsar,yahoo/pulsar,sschepens/pulsar,nkurihar/pulsar,saandrews/pulsar,tkb77/pulsar,jai1/pulsar,yahoo/pulsar,yush1ga/pulsar,jai1/pulsar,sschepens/pulsar,merlimat/pulsar,tkb77/pulsar,massakam/pulsar,saandrews/pulsar,jai1/pulsar,ArvinDevel/incubator-pulsar,jai1/pulsar,tkb77/pulsar,saandrews/pulsar,ArvinDevel/incubator-pulsar,jai1/pulsar,merlimat/pulsar,yahoo/pulsar,tkb77/pulsar