added support to include rundeck logs in the jenkins build log

Hi Greg,

hope all is well....

A while ago I expressed interest in including rundeck logs within the output of a Jenkins job.

When we switched from Bamboo to Jenkins, we needed to re-introduce this capability.   We have just forked and implemented this capability and would like you to review this pull request so that we can be inline with the public version.   

I'm not clear on how to adjust the plugin wiki within jenkins-ci.org and we would probably adjust this as well.

A new checkbox,  "Include Rundeck job output?" has been added which would also require, "Wait for Rundeck job to finish" to be enabled.

At the end of the job, rundeck output will be added.

I am open to any other modifications that you all foresee as necessary.


Thanks,

Chuck