Merge pull request #120 from wtangiit/master

support uploading output from a subdirectory
added functions for job downloads
Merge branch 'master' of https://github.com/MG-RAST/AWE
Merge pull request #121 from wgerlach/master

added functions for job downloads
Merge pull request #122 from wtangiit/master

enable awe-client to checkout any workunit