Bump to 1.6.1 and use version from submodule

Use the version from the submodule for the gem version. So it is
consistent with other types of toolkit packages.

Change the jenins.sh to update the version of the submodule as part of jenkins.sh and commit the updated submodule after the gem has been published. I can then update jenkins to push the master branch as a post build step.
I think you meant not equals here...

Having said that, this is replicating the conditional logic that gem_publisher uses to determine whether to publish a gem, but in a slightly different way.  I think it would be good to use the login in gem_publisher for both steps (creating the new commit, and pushing the gem out).  This would involve moving all the publishing steps into the publish_gem rake task.