quickstart.md in review-3.0.0.rc1

- old
+ new

@@ -7,15 +7,15 @@
 
 Re:VIEW is free software under the terms of the GNU Lesser General Public License Version 2.1, so you can use, modify and redistribute it. This license has no relations with your documents using Re:VIEW, so your documents are not forced to use this license. When you want to distribute Re:VIEW software itself or the system including Re:VIEW software, you should read COPYING file carefully.
 
 This article describes how to setup Re:VIEW and use it.
 
-The supported version of the article is Re:VIEW 2.0.
+The supported version of the article is Re:VIEW 3.0.
 
 ## Set up Re:VIEW
 
-Re:VIEW is a software in Ruby and worked in Linux/Unix, Mac OS X, and Windows. You can install Re:VIEW with RubyGems or Git.
+Re:VIEW is a software in Ruby and worked in Linux/Unix, macOS, and Windows. You can install Re:VIEW with RubyGems or Git.
 
 Note that Re:VIEW format is plain texts with simple markups in UTF-8, so you can write it on any editors and OSes.
 
 ### using RubyGems
 
@@ -80,12 +80,13 @@
 * Rakefile : rule file for `rake` command
 * images : folder for images
 * layouts : forlder for layout files
 * style.css : sample stylesheet
 * sty : style files for LaTeX
+* doc : various documents (including this document)
+* lib : detailed rule files of rake command and etc.
 
-
 ### writing Re:VIEW documents and converting them
 
 ```review
 = My First Re:VIEW
 
@@ -203,9 +204,30 @@
 
 You can also use `review-index` command to generate header list.
 
 ```bash
 $ review-index --level <heading level> -a
+```
+
+## how to update the document folder to the new Re:VIEW version
+
+Re:VIEW is updated regularly. We Re:VIEW team watch the backward compatibility carefully, but if you want to use the features in the new version, you can use review-update command to update the document folder.
+
+```bash
+$ review-update
+** review-update updates your project to 3.0.0 **
+config.yml: Update 'review_version' to '3.0'? [y]/n
+Rakefile will be overridden with Re:VIEW version (/.../review/samples/sample-book/src/Rakefile). Do you really proceed? [y]/n
+lib/tasks/review.rake will be overridden with Re:VIEW version (/.../review/samples/sample-book/src/lib/tasks/review.rake). Do you really proceed? [y]/n
+INFO: new file /.../sty/plistings.sty is created.
+/.../sty/reviewmacro.sty will be overridden with Re:VIEW version (/.../review/templates/latex/review-jsbook/reviewmacro.sty). Do you really proceed? [y]/n
+INFO: new file /.../sty/README.md is created.
+INFO: new file /.../sty/review-custom.sty is created.
+INFO: new file /.../sty/review-jsbook.cls is created.
+INFO: new file /.../sty/review-style.sty is created.
+INFO: new file /.../sty/review-base.sty is created.
+INFO: new file /.../sty/gentombow09j.sty is created.
+Finished.
 ```
 
 ## Copyright
 
 The original author of Re:VIEW is Minero Aoki. The current maintainer is Kenshi Muto(@kmuto), and committers are Masayoshi Takahashi and Masanori Kado (September 2018).