Update to the latest bootstrap script, v2014.10.28

* Install the python systemd bindings for Arch and Fedora git installations
* Allow cloning from Salt's git repository using HTTPS. saltstack/salt-bootstrap#475
Merge pull request #16947 from s0undt3ch/hotfix/bootstrap-script

Update to the latest bootstrap script, v2014.10.28
Merge branch '2014.7' into develop