Merge branch 'release/0.8.0-RC.7' into develop
Updated version for next release cycle
Add :allow-unsigned to the package action doc string
Add to doc string for crate install
Update to stevedore 0.8.0-beta.6

Fixes the `group` implementation
Fix silent failures of chown in state-root

Failures in chown when reflecting the permissions of the file system
tree into state-root were not being reported.
Fix state-root directory creation
Allow override of node os-family and os-version
Fix logging in pallet.crate-install
Fix live-test
Fix effective username for :script-prefix :no-sudo
Respect *script-location-info* at runtime

In exec-check-script, evaluate *script-location-info* at runtime rather
than compile time.
Add setup-node action

The setup-node action is used to setup the state-root
directory (/var/lib/pallet by default).  It must be run with sufficient
privileges to create the state-root directory.  You need to include this
action if working :no-sudo, in order for the node state to function
correctly.
Add ContentFiles, remove user-file-path

Decomplects the path used for interim content in remote-file, from the
file-uploader.
Remove script-no-comment= in filesystem crate test
Fix state-root tmp permission in setup-node-script

The owner and mode were being set incorrctly.
Updated project.clj, release notes and readme for 0.8.0-RC.8
Merge branch 'release/0.8.0-RC.8'