tidy up .fixtures.yml
add :require => false to all Gemfile entries
sort .gitignore
tidy Rakefile
update .nodeset.yml to current version from rspec-puppet master

https://raw.github.com/puppetlabs/rspec-system/master/.nodeset.yml
fix rspec-system-serverspec > 2 deprecation warning

    [DEPRECATED] Serverspec::Helper::RSpecSystem is deprecated and should no longer be included. See the README for information.