Update create.pp
Update create.pp

Just some minor changes to help people adopt this module.  Old ami isn't there, won't work without a subnet, figuring out what to put in as the subnet requires some thought...
hundredacres/puppetlabs-aws,puppetlabs/puppetlabs-aws,gregohardy/puppetlabs-aws,daveseff/puppetlabs-aws,daveseff/puppetlabs-aws,marksyme/puppetlabs-aws,gregohardy/puppetlabs-aws,zleswomp/puppetlabs-aws,puppetlabs/puppetlabs-aws,hundredacres/puppetlabs-aws,marksyme/puppetlabs-aws,zleswomp/puppetlabs-aws