Track the type of deployment as additional meta

This will allow us to start handling different types of deployments
to the platform. By default we assume a public theme. We'll need to
account for other possibilities in our shell script as well
Tags can only be alphanumeric with dashes and dots
Add deploy type to the arguments passed to deploy-build.sh
Handle the attachment of a repository URL to the deployment
Add docs to display_deploy_type()
Call the deploy-build script with the repository URL
Check for the theme-public action in deploy-build.sh
Add theoretical support for a plugin-public action
Add theoretical support for a build-themes-public action
Add handling for the build-plugins-public action in deploy-build.sh
Add handling for build-themes-public action in deploy-build.sh
Bump version to 0.3.0
Merge pull request #3 from washingtonstateuniversity/feature/plugins

[PR] Introduce deployments for platform, plugins, and remaining themes