Vendor temporarily

vendor/github.com/mitchellh/cli/README.md

@@ -0,0 +1,67 @@
+# Go CLI Library [![GoDoc](https://godoc.org/github.com/mitchellh/cli?status.png)](https://godoc.org/github.com/mitchellh/cli)
+
+cli is a library for implementing powerful command-line interfaces in Go.
+cli is the library that powers the CLI for
+[Packer](https://github.com/mitchellh/packer),
+[Serf](https://github.com/hashicorp/serf),
+[Consul](https://github.com/hashicorp/consul),
+[Vault](https://github.com/hashicorp/vault),
+[Terraform](https://github.com/hashicorp/terraform), and
+[Nomad](https://github.com/hashicorp/nomad).
+
+## Features
+
+* Easy sub-command based CLIs: `cli foo`, `cli bar`, etc.
+
+* Support for nested subcommands such as `cli foo bar`.
+
+* Optional support for default subcommands so `cli` does something
+  other than error.
+
+* Support for shell autocompletion of subcommands, flags, and arguments
+  with callbacks in Go. You don't need to write any shell code.
+
+* Automatic help generation for listing subcommands
+
+* Automatic help flag recognition of `-h`, `--help`, etc.
+
+* Automatic version flag recognition of `-v`, `--version`.
+
+* Helpers for interacting with the terminal, such as outputting information,
+  asking for input, etc. These are optional, you can always interact with the
+  terminal however you choose.
+
+* Use of Go interfaces/types makes augmenting various parts of the library a
+  piece of cake.
+
+## Example
+
+Below is a simple example of creating and running a CLI
+
+```go
+package main
+
+import (
+	"log"
+	"os"
+
+	"github.com/mitchellh/cli"
+)
+
+func main() {
+	c := cli.NewCLI("app", "1.0.0")
+	c.Args = os.Args[1:]
+	c.Commands = map[string]cli.CommandFactory{
+		"foo": fooCommandFactory,
+		"bar": barCommandFactory,
+	}
+
+	exitStatus, err := c.Run()
+	if err != nil {
+		log.Println(err)
+	}
+
+	os.Exit(exitStatus)
+}
+```
+