Update vendor for all new features

vendor/github.com/rakyll/statik/fs/walk.go

@@ -0,0 +1,79 @@
+// Copyright 2014 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package fs
+
+import (
+	"bytes"
+	"io"
+	"net/http"
+	"path"
+	"path/filepath"
+)
+
+// Walk walks the file tree rooted at root,
+// calling walkFn for each file or directory in the tree, including root.
+// All errors that arise visiting files and directories are filtered by walkFn.
+//
+// As with filepath.Walk, if the walkFn returns filepath.SkipDir, then the directory is skipped.
+func Walk(hfs http.FileSystem, root string, walkFn filepath.WalkFunc) error {
+	dh, err := hfs.Open(root)
+	if err != nil {
+		return err
+	}
+	di, err := dh.Stat()
+	if err != nil {
+		return err
+	}
+	fis, err := dh.Readdir(-1)
+	dh.Close()
+	if err = walkFn(root, di, err); err != nil {
+		if err == filepath.SkipDir {
+			return nil
+		}
+		return err
+	}
+	for _, fi := range fis {
+		fn := path.Join(root, fi.Name())
+		if fi.IsDir() {
+			if err = Walk(hfs, fn, walkFn); err != nil {
+				if err == filepath.SkipDir {
+					continue
+				}
+				return err
+			}
+			continue
+		}
+		if err = walkFn(fn, fi, nil); err != nil {
+			if err == filepath.SkipDir {
+				continue
+			}
+			return err
+		}
+	}
+	return nil
+}
+
+// ReadFile reads the contents of the file of hfs specified by name.
+// Just as ioutil.ReadFile does.
+func ReadFile(hfs http.FileSystem, name string) ([]byte, error) {
+	fh, err := hfs.Open(name)
+	if err != nil {
+		return nil, err
+	}
+	var buf bytes.Buffer
+	_, err = io.Copy(&buf, fh)
+	fh.Close()
+	return buf.Bytes(), err
+}