Fix service-script

* Removing invalid argument :service-impl when calling remote-file
Fix debian backports.
Fix test for debian-backports
Fix: After eval'ing :action-options into the wrong env map key
Make the :user config optional for nohup crate

When using the nohup service crate, the :user option is now optional.

Fixes #310
Fix remote-directory with a url and md5

Remote-directory with a url and md5 was failing due to the filename of the
intermediate directory not matching the original download filename.
Print session when error in pallet up, summary if success.
Enable lein-pallet-release
Update to ssh-transport 0.5.1
Remove release script
Update to lein-pallet-release 0.1.3
Updated project.clj, release notes and readme for 0.8.0-RC.9
Updated version for next release cycle