Added galaxy.libraries.get_folders().
Added filtering to galaxy.workflows.get_workflows().
Merge pull request #42 from cjav/get_folders

Added galaxy.libraries.get_folders().
Merge pull request #43 from cjav/get_workflows

Added filtering to galaxy.workflows.get_workflows().
When printing ConnectionError, print the body of the error message too
Stop using cidr_range when setting up CloudMan-required security group and resort to using the group itself. AWS has supported this for a while and so does OpenStack now (not sure about other clouds).