This prevents the `return` key being duplicated in the minion config by L1205

* From `salt-winrepo-ng`:
  + https://github.com/saltstack/salt-winrepo-ng/blob/master/salt-minion-py2.sls
    - Package: `salt-minion`
  + https://github.com/saltstack/salt-winrepo-ng/blob/master/salt-minion-py3.sls
    - Package: `salt-minion-py3`
* Close #411

* Prepare for selecting correct version of Windows `salt-minion` pkg

This reverts commit 2a0f4617db.

* Close #403

To match the one used by the bootstrapper. Otherwhise, we end up with two repos configured

Use py3 for latest salt version
Use Python 2 on old distros
Update Gemfile
Updated centos-6 run_command, as it does not use systemd
Added tests to verify correct package versions for all cases tested

e.g. TurnKey Linux amongst others

* All minor releases appear in an `archive` sub-directory.
* Resolves main bug in GitHub issue #364.
* Simplification of original GitHub PR #365 by @ralucasg.

Signed-off-by: Johannes Löthberg <johannes@kyriasis.com>

Remove commented version and associated comment, as we still have the same
option earlier in config with an other valid comment.

* Ensure options for formulas `git.latest` are also based on defaults

* Prevent erroneous remote tracking branch modification by `salt.formulas` #238

* Allow multiple envs to use the same gitdir for `salt.formulas`

* Ensure `gitdir` original branch is checked out after formulas `git.latest`

* Fix erroneous comment re: merging in `salt` pillar

closes #367

* Minion/returner/elasticsearch yaml read fix.

* Improved the documentation for the elasticsearch returner

* Add MacOS support; fix Issue #352

* On MacOS, only attempt download if condition

Add if salt_settings.install_packages to requisites for an attempt to download the minion package on MacOS

* Update example pillar for MacOS support

Describe how to use MacOS specific options

* Add MacOS notes

* Update README.rst

* Update README.rst

* Added quotration around globing rules

salt.gitfs.gitpython.install_from_source == False on RedHat
Not sure about other O/S'es as to what default value should be

Add quick sanity check at start of state, do not attempt to do anything unless salt.gitfs.gitpython exists to check for install_from_source within