deploytool: Add README.md, migrate docs to it.

deploytool/cmd/title.go

Index: deploytool/cmd/title.go
diff --git a/deploytool/cmd/title.go b/deploytool/cmd/title.go
deleted file mode 100644
index f2e77dbd5ce90396a119cae52bade88d0b01dcac..0000000000000000000000000000000000000000
--- a/deploytool/cmd/title.go
+++ /dev/null
@@ -1,47 +0,0 @@
-// Copyright 2016 The LUCI Authors. All rights reserved.
-// Use of this source code is governed under the Apache License, Version 2.0
-// that can be found in the LICENSE file.
-
-package main
-
-import (
-	"path/filepath"
-	"unicode"
-
-	"github.com/luci/luci-go/common/errors"
-)
-
-type title string
-
-func (t title) validate() error {
-	if len(t) == 0 {
-		return errors.New("cannot be empty")
-	}
-
-	idx := 0
-	for _, r := range t {
-		if !(unicode.IsLetter(r) || unicode.IsNumber(r) || r == '-') {
-			return errors.Reason("character at %(pos)d (%(char)c) is not permitted in a title").
-				D("pos", idx).D("char", r).Err()
-		}
-		idx++
-	}
-	return nil
-}
-
-// titleFromConfigPath returns the title of a configuration item identified by
-// the specified configuration file.
-//
-// If the file was not a valid config path, or the title was not valid, an error
-// will be returned.
-func titleFromConfigPath(path string) (title, error) {
-	path = filepath.Base(path)
-	if filepath.Ext(path) == configExt {
-		t := title(path[:len(path)-len(configExt)])
-		if err := t.validate(); err != nil {
-			return "", err
-		}
-		return t, nil
-	}
-	return "", errors.Reason("missing config extension [" + configExt + "]").Err()
-}