Add docker as platform instace provider for test-kitchen. Add parameter for choosing driver, default value "vagrant"
Add kitchen-docker gem installation depends on choosen driver
Merge pull request #15 from yurinnick/add_docker_provisioner

Add test-kitchen docker driver support
version bump
add rubocop config file
updated drone to include `USE_SYSTEM_GECODE`
added support for --version
updated Gemfile
updated documentation
added support for a Dockerfile