Update doc.

Author: jcs090218

README.md

@@ -1,22 +1,19 @@
 [![Build Status](https://travis-ci.com/jcs-elpa/indent-control.svg?branch=master)](https://travis-ci.com/jcs-elpa/indent-control)
 [![License: GPL v3](https://img.shields.io/badge/License-GPL%20v3-blue.svg)](https://www.gnu.org/licenses/gpl-3.0)
 
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 # indent-control
-> Generic control the indentation level for each mode.
+> Management for indentation level.
 
 Interface that combine all the indentation variables from each major mode
 to one giant list.
 
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 ## Features
 
 * Decouple from user knowing each major mode's indentation level variable. (if have)
 * Keep the indentation level across buffers. If you changed the indentation level
 in `buffer A` and switch to `buffer B` with the same major mode; they will have 
 the same indentation level.
 
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 ## Usage
 
 You can tweak variable `indent-control-records ` to set the initial
@@ -76,7 +73,6 @@ so you would have to do the following.
 (add-hook 'actionscript-mode-hook #'my-actionscript-mode-hook)
 ```
 
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 ## Contribution
 
 If you would like to contribute to this project, you may either