These scripts set up the jobs needed to do one click releases.
List of changes:
Do not put files in mvn-artifacts/$ARCH. This makes the view uniform
across unix and windows and is easier to sign and upload.
A working curl is needed to build protobuf from source, so run yum
update.
run_in_docker.sh: use chmod to fix permisisons, do not set up user
linux_artifact builds 32 and 64 artifacts using unix.sh
add upload_artifacts cfg and script