Create chef-dk gem.
-v / --version CLI option.
README.md for Chef Development Kit.
sub_command infra and placeholder verify command.
Enable travis for chef-dk.
Merge pull request #1 from opscode/CC-14

CC-14: Create chef-dk gem
Add a simple gem command to install to the bundled gems
Rework the command loader to be as lazy as possible

Commands are defined in a mini-DSL that specifies their CLI name (what
you type after `chef` in bash to invoke that subcommand), their class
name, the path to require to load them, and a short description. This
minimizes the amount of code we need to load to invoke any CLI command
so that command latency is minimized.
Add trap for interrupt as early as possible in the CLI
Merge pull request #3 from opscode/cmd-loader

Rework the command loader to be as lazy as possible
Remove XXX tag from inline doc
Verify command for chef which runs the specs for the components.
Handle default options (-v / --version / -h / --help) outside optparser.
Reorganization based on PR comments.
Merge pull request #4 from opscode/CC-15

Verify command for chef which runs the specs for the components.
Set required ruby version to >= 2.0 in the gemspec

We're using keyword arguments with some methods, so we really do need
ruby 2.0+
Add embedded/bin to the PATH in order to be able to run bundler commands during verification.
Add chef-dk verification to chef-dk verify command.
Remove git reference from gemspec.
Merge pull request #6 from opscode/CC-44

CC-44: Verify chef-dk gem during "chef verify"