0.2.0-pre1

Changes since 0.1.0:

• Drop TTY::Prompt dependency (#43)
• Split mortar to fire & yank subcommands (#40, #47)
• k8s-client 0.4.1 (#48, #45)
• fix docker build (#44)
• Fix base64 detection (#20)
• Warn when there is nothing to do (#26)
• Add .each to generated variables struct (#14)
• Add binary building (#16)

Breaking changes:

Mortar now has two specific subcommands: fire to shoot the manifests and yank to remove the named shot/deployment.