Puppeter

Fix for installing on OL6 on some machines for ex.: Vagrant's `boxcutter/ol68`

Fixing bug with setup.sh running on OL6 without yum-utils installed

Fixes issue 25

Features:

* Added 'system' install type, that installs puppet from underlying OS
* Added automated install script

Features:

* Added integration test via Phial running on top of Docker
* Configured CircleCI to run integration tests for various OSs

Bugs fixed:

* Fixed bug for installing Puppet Platform 5 on CentOS - issue was caused by Puppet changing location of files on `yum.puppetlab.com` site

* Bugfix: 10 fixing bug with csr attributes file permissions on Puppet agent nodes