add SSL configuration instructions to README
cleanup README

* Make a hypothetical puppet-lint run happy
* Remove redundant parameters from resource declarations (e.g. 'ensure')
* Unquote a boolean which would fail with the recently added validations
* Simplify Puppet w/ Passenger example by removing SSL cipher/cache settings
* Add syntax highlighting where it was missing
* Provide complete vhost example for "Nginx with precompiled Passenger"
Merge pull request #230 from 3flex/README-updates

README updates