Updates for puller_simple to collect identity files from any of the known engines. Will prompt for password while we do not have an effective identity file to use.

git-svn-id: svn+ssh://civmxsrv2.duhs.duke.edu/Users/civmsvn/svn/repos/pipeline_utilities/trunk@2198 d41079a3-eaa1-4f09-8506-b324c47726bb
disabled fifo mode on cluster by checking that our hostname isnt civmcluster1. This needs improvement in the future. Especially looking into making fifos for the cluter and how that would be appropriate.

git-svn-id: svn+ssh://civmxsrv2.duhs.duke.edu/Users/civmsvn/svn/repos/pipeline_utilities/trunk@2199 d41079a3-eaa1-4f09-8506-b324c47726bb
pile of updates related to getting data remotely. specifically updated our retrieve_archived_data module to rely on perl prog puller_simple.
ssh_call was upaated with a function to gather ssh keys when desired.

git-svn-id: svn+ssh://civmxsrv2.duhs.duke.edu/Users/civmsvn/svn/repos/pipeline_utilities/trunk@2200 d41079a3-eaa1-4f09-8506-b324c47726bb
Updates for getting data via pipelines. Changed get_dir's to both call the same core function

git-svn-id: svn+ssh://civmxsrv2.duhs.duke.edu/Users/civmsvn/svn/repos/pipeline_utilities/trunk@2201 d41079a3-eaa1-4f09-8506-b324c47726bb
Merge branch 'master' of github.com:jamesjcook/pipeline_utilities