bumped nuget version to 0.6.3
bumped nuget version to 0.6.3

jokokko/marten,mysticmind/marten,ericgreenmix/marten,mdissel/Marten,mysticmind/marten,tim-cools/Marten,mdissel/Marten,ericgreenmix/marten,jamesfarrer/marten,jokokko/marten,JasperFx/Marten,jokokko/marten,mysticmind/marten,tim-cools/Marten,jokokko/marten,mysticmind/marten,jmbledsoe/marten,ericgreenmix/marten,ericgreenmix/marten,jokokko/marten,jmbledsoe/marten,jamesfarrer/marten,jmbledsoe/marten,jamesfarrer/marten,tim-cools/Marten,JasperFx/Marten,jmbledsoe/marten,jamesfarrer/marten,jmbledsoe/marten,JasperFx/Marten