Update README.md to mention about showsRSS and shareThis configuratio…

…ns and about the theme color change.

README.md

@@ -47,9 +47,11 @@ subtitle = "I would like to be a layer 3 switch."
 facebook = "https://facebook.com/foobar"
 twitter = "https://twitter.com/foobar"
 github = "https://github.com/foobar"
+showsRSS = true
 profile = "/images/profile.png"
 copyright = "Written by Asuka Suzuki"
 analytics = "UA-XXXXXXXX-X"
+shareThis = "XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX"
 ```
 
 Details of each parameter are as follows.
@@ -64,16 +66,28 @@ Details of each parameter are as follows.
 | facebook | no | Enter the URL of Facebook. If you do not enter, the link is hidden. |
 | twitter | no | Enter the URL of Twitter. If you do not enter, the link is hidden. |
 | github | no | Enter the URL of Github. If you do not enter, the link is hidden. |
+| showsRSS | no | Enter true to show the URL of RSS. If you enter false or nothing, the link is hidden. |
 | profile | no | Enter the path to the profile image. If you do not enter, profile section will be hidden. |
 | copyright | no | Enter the copyright notice. If you do not enter, copyright display is hidden. |
 | analytics | no | Enter the tracking ID of Google analytics. If you do not enter, the analysis will be skipped. |
+| shareThis | no | Enter the publisher key of ShareThis. If you do not enter, the ShareThis buttons are hidden. |
 
 
 ## Style Customization
 
+To change the theme color, edit the `layouts/static/theme.less`.
+Then compile the LESS file by using [one of LESS compilers](http://leafo.net/lessphp/editor.html),
+and replace the content of `layouts/static/theme.css` with the compiled CSS.
+
 The default theme color is `#29abe2`.
 Please change the favorite color.
 
+```
+/* Theme color
+--------------------------------------------------*/
+@color: #29abe2;
+```
+
 For original styles, please edit the `layouts/static/custom.css`.