Add "chef-dk-gemset" gem with full set of chef-dk deps

Includes a Gemfile and Gemfile.lock representing what
should be built into omnibus.

chef-dk-gemset/.gitignore

@@ -0,0 +1,56 @@
+# Project specific: generated version file
+generated
+
+# OS stuff
+/tmp/
+# Mac folder properties
+.DS_Store
+
+# Gemfile.lock is the whole point of this
+! Gemfile.lock
+! Gemfile.local
+
+# build packages
+pkg
+
+# Bundler
+# Do not check in the .bundle directory, or any of the files inside it. Those files are specific to each p articular machine, and are used to persist installation options between runs of the bundle install command .
+/.bundle/
+# ignore some common Bundler 'binstubs' directory names
+# http://gembundler.com/man/bundle-exec.1.html
+/b/
+/binstubs/
+
+# RVM and RBENV ruby version files
+.rbenv-version
+.rvmrc
+.ruby-version
+.ruby-gemset
+
+# Tests
+.autotest
+/coverage/
+
+# IDE files
+# ... Visual Studio?
+.project
+# VS Code
+.settings
+# VIM
+*~
+
+# Documentation
+.yardoc/
+_yardoc/
+
+# Chef
+.kitchen
+Berksfile.lock
+.chef
+
+# Vagrant
+.vagrant
+
+# Not sure what these are for
+/tags/
+*/tags

chef-dk-gemset/Gemfile

@@ -0,0 +1,13 @@
+source "https://rubygems.org"
+
+# Specify your gem"s dependencies in chef-dk-gemset.gemspec
+gemspec
+
+# Allow Travis to run tests with different dependency versions
+gem "chef-dk", path: ".."
+gem "appbundler", github: "chef/appbundler", branch: "jk/multiple-gems"
+install_if -> { RUBY_PLATFORM.downcase !~ /(aix|cygwin)/ } do
+  gem "ruby-shadow"
+end
+
+instance_eval(ENV["GEMFILE_MOD"]) if ENV["GEMFILE_MOD"]