Mina 1.2 along with mina-circle 3 beta

[cromwellryan]

Upgrades mina to 1.2 and corresponding updates to mina-circle 3.0.0.beta.1

To test:

1. docker build -t sparkbox/mina-deploy:local . will build a local instance of mina-deploy.
2. Run docker run -it --rm sparkbox/mina-deploy:local
3. Ensure you see the --help output which should include mina [-f rakefile] {options} targets... and the option flags list.
4. Run docker run -it --rm sparkbox/mina-deploy:local --version
5. Ensure you see Mina, version v1.2.3
6. Run docker run -it --rm sparkbox/mina-deploy:local --tasks
7. Ensure you see mina init # Creates a sample config file
8. Run docker run -it --rm -v ${PWD}:/deploy sparkbox/mina-deploy:local init
9. You should now have a config/deploy.rb file

You can delete the config/deploy.rb file when you're done.

Docker Image: I've also configured automatic image builds on Docker Hub. When this is merged, the latest Docker image for mina-deploy will be built and published. We'll also want to publish a 2.0.0 tag of this repository so that folks can depend directly on this version of mina-deploy.

• Publish 2.0.0 tag to Github.