add about <Plug>(clever-f-reset)

README.md

@@ -1,6 +1,6 @@
 ## INTRODUCTION [![Build Status](https://travis-ci.org/rhysd/clever-f.vim.png?branch=master)](https://travis-ci.org/rhysd/clever-f.vim)
 
-clever-f.vim extends `f`, `F`, `t` and `T` mappings for more convenience.  Instead of `;`, `f` is available to repeat after you type `f{char}` or `F{char}`.  `F` after `f{char}` and `F{char}` is also available to undo a jump. `t{char}` and `T{char}` are ditto. This extension makes a repeat easier and makes you forget the existence of `;`. You can use `;` for other key mapping.
+clever-f.vim extends `f`, `F`, `t` and `T` mappings for more convenience.  Instead of `;`, `f` is available to repeat after you type `f{char}` or `F{char}`.  `F` after `f{char}` and `F{char}` is also available to undo a jump. `t{char}` and `T{char}` are ditto. This extension makes a repeat easier and makes you forget the existence of `;`. You can use `;` for other key mapping.  If you want to reset the searching character without moving cursor, map `<Plug>(clever-f-reset)` to your favorite key.
 In addition, you can customize a behavior of the mappings.