Improve yard doc for NodeSet::Base somewhat

Signed-off-by: Ken Barber <ken@bob.sh>
Merge branch 'fix_yard_for_nodeset_base'

* fix_yard_for_nodeset_base:
  Improve yard doc for NodeSet::Base somewhat
Merge pull request #20 from treydock/system_tmp_changes

Change the tmp path for the vagrant_projects directory
Release 1.7.0

Signed-off-by: Ken Barber <ken@bob.sh>
- Add rspec-system executable
- Provide 'init' executable subcommand to setup a project to use rspec-system
- TODO: Possibly refactor using boson or find a way with Thor to allow helper libraries to extend and add subcommands
- Issue #21
Merge branch 'master' of https://github.com/puppetlabs/rspec-system
Merge branch 'add_commandline_tool'