Completely decouple vlf integration from other functionality.

README.org

@@ -47,7 +47,13 @@ integer value).
 
 ** Applicability
 
-You can control when vlf-mode is invoked or offered as choice with the
+To have *vlf* offered as choice when opening large files:
+
+#+BEGIN_EXAMPLE
+(require 'vlf-integrate)
+#+END_EXAMPLE
+
+You can control when vlf-mode is invoked or offered with the
 *vlf-application* customization option.  By default it will offer VLF
 when opening large files.  There are also options to never use it (you
 can still call *vlf* command explicitly); to use it without asking for
@@ -70,7 +76,7 @@ To disable automatic usage of VLF for a function, for example named
 *func* defined in file *file.el*:
 
 #+BEGIN_EXAMPLE
-(vlf-disable-for-function func "file.el")
+(vlf-disable-for-function func "file")
 #+END_EXAMPLE
 
 ** Keymap

vlf-base.el

@@ -35,6 +35,11 @@
         (t ;; TODO: use (< emacs-minor-version 4) after 24.4 release
          (string-lessp emacs-version "24.3.5")))
   "Indicates whether partial decode codes are displayed.")
+(unless (fboundp 'file-size-human-readable)
+  (defun file-size-human-readable (file-size)
+    "Print FILE-SIZE in MB."
+    (format "%.3fMB" (/ file-size 1048576.0))))
+
 
 (defun vlf-move-to-chunk (start end &optional minimal)
   "Move to chunk determined by START END.

vlf.el

@@ -26,10 +26,12 @@
 ;; Boston, MA 02111-1307, USA.
 
 ;;; Commentary:
-;; This package provides the M-x vlf command, which visits part of a
-;; large file without loading the entire file.
-;; The buffer uses VLF mode, which defines several commands for
+;; This package provides the M-x vlf command, which visits part of
+;; large file without loading it entirely.
+;; The buffer uses VLF mode, which provides several commands for
 ;; moving around, searching and editing selected part of file.
+;; To have it offered when opening large files:
+;; (require 'vlf-integrate)
 
 ;; This package was inspired by a snippet posted by Kevin Rodgers,
 ;; showing how to use `insert-file-contents' to extract part of a
@@ -37,11 +39,13 @@
 
 ;;; Code:
 
-;;;###autoload
-(require 'vlf-integrate)
-
 (require 'vlf-base)
 
+(defgroup vlf nil
+  "View Large Files in Emacs."
+  :prefix "vlf-"
+  :group 'files)
+
 (defcustom vlf-batch-size 1024
   "Defines how large each batch of file data is (in bytes)."
   :group 'vlf