Stage all untracked files when on "Untracked files" title.

* magit.el (magit-stage-item): Here.

NEWS

@@ -51,6 +51,9 @@ Changes in magit 0.7:
 * Typing 'k' on the "Untracked files" section title will offer to
   delete all untracked files.
 
+* Similarily, hitting 's' on the "Untracked files" section title will
+  stage all untracked files.
+
 * Magit understands a bit of git-svn: the status buffer shows unpushed
   and unpulled commits, 'N r' runs git svn rebase, and 'N c' runs git
   svn dcommit.

magit.el

@@ -1949,6 +1949,9 @@ in log buffer."
   (magit-section-action (item info "stage")
     ((untracked file)
      (magit-run-git "add" info))
+    ((untracked)
+     (apply #'magit-run-git "add" "--"
+	    (magit-git-lines "ls-files" "--other" "--exclude-standard")))
     ((unstaged diff hunk)
      (if (magit-hunk-item-is-conflict-p item)
 	 (error (concat "Can't stage individual resolution hunks.  "

magit.texi

@@ -200,7 +200,9 @@ During a history rewriting session, the status buffer shows the
 
 Untracked files are shown in the @emph{Untracked files} section.
 
-You can add a untracked file to the staging area with @kbd{s}.
+You can add a untracked file to the staging area with @kbd{s}.  If
+point is on the @emph{Untracked files} section title when you it
+@kbd{s}, all untracked files are staged.
 
 You can instruct Git to ignore them by typing @kbd{i}.  This will add
 the filename to the @code{.gitignore} file.  Typing @kbd{C-u i} will
@@ -208,7 +210,7 @@ ask you for the name of the file to ignore.  This is useful to ignore
 whole directories, for example.  The @kbd{I} command is similar to
 @kbd{i} but will add the file to @code{.git/info/exclude} instead.
 
-To delete a untracked file forever, use @kbd{k}.  If point is one the
+To delete a untracked file forever, use @kbd{k}.  If point is on the
 @emph{Untracked files} section title when you it @kbd{k}, all
 untracked files are deleted.