Make 'mapleader' an option and fix the help fragment scrolling issue.

pentadactyl/NEWS

@@ -46,6 +46,8 @@
     * IMPORTANT: 'extendedhinttags' is now a regexmap rather than a
       string.
     * IMPORTANT: 'guioptions' default value has changed.
+    * IMPORTANT: 'mapleader' is now an option rather than a :let
+      variable.
     * Added g; continued extended hint mode and removed ;F
     * Added "bookmarks", "diverted", and "links" to 'activate'
       option

pentadactyl/TODO

@@ -27,7 +27,6 @@ BUGS:
 FEATURES:
 9 Add quoting help tag
 8 Document Caret and Visual modes.
-8 make 'mapleader' an option
 8 replace global variables with plugin scoped user options
 8 fix local options
 8 adaptive timeout for auto-completions, :set completions can be updated more often than