(windows) Do not install puppet if already installed
(windows) Do not install puppet if already installed

If the puppet command exists, do not attempt to reinstall puppet. Note that
this will only work if puppet is put on the PATH. This is done automatically
starting with Puppet 3.3.1 MSI (
http://docs.puppetlabs.com/windows/installing.html#after-installation ).

cregev/puppet-bootstrap,mmcquillan/puppet-bootstrap,rbramwell/puppet-bootstrap,virajs/puppet-bootstrap,braf/puppet-bootstrap,czhujer/puppet-bootstrap,hashicorp/puppet-bootstrap,jeckhart/puppet-bootstrap,chadq/puppet-bootstrap,zpetr/puppet-bootstrap,MiamiOH/puppet-bootstrap,SugarFactory/puppet-bootstrap