moved 'stage' to 'config', now returning a dict of config;
background instead of fgbg; added a nicer repr for tunnel 


git-svn-id: svn+ssh://svn.mystic.cacr.caltech.edu/pathos/pathos@664 8bfda07e-5b16-0410-ab1d-fd04ec2748df
Merge branch 'master' of https://github.com/uqfoundation/pathos