* Use gem to replace local utility library.
* Add Dockerfile to run rake build.
* Removed non-system gem packages and update travis ci to use docker container.
* Update the Dockerfile to use environment variable.
* Set ruby version by default to avoid unnecessary warnings due to gemfile.
* Add support of test kitchen on azure compute module.
* Add test case for local.
* add test ruby file for terraform state file.
* Update readme and test case.
* Update the Gemfile for version range.
* Update the commit for minimum version for ruby in README.md.
* Introduce Rake and Travis-CI for compute module.
* add badge for travis ci result.
* Update the travis file to download and install terraform.
* add matrix for osx.
* add gpg valiation for terraform.
* add TERRAFORM_VERSION as global env var.
* disable os x build by default.