add changes for 3.5.1
add changes for 3.5.1

brianstien/protobuf,ruby-protobuf/protobuf,lookout/protobuffy,brianstien/protobuf,quixoten/protobuf,localshred/protobuf,quixoten/protobuf,zanker/protobuf,film42/protobuf,film42/protobuf,ruby-protobuf/protobuf,zanker/protobuf,lookout/protobuffy,localshred/protobuf