Update README.md

Add menu!

Author: PeterDaveHello

README.md

@@ -1,6 +1,19 @@
 # ColorEchoForShell
 Make echo colorful with easier method. In [bash](https://www.gnu.org/software/bash/), [sh](https://en.wikipedia.org/wiki/Bourne_shell), [fish](http://fishshell.com/), [ksh](http://www.kornshell.com/) and [zsh](http://www.zsh.org/).
 
+## MENU
+* [`MENU`](#menu)
+* [`Installation`](#installation)
+* [`Usage`](#usage)
+* [`Examples`](#examples)
+* [`Supported shells`](#supported-shells)
+* [`Supported styles`](#supported-styles)
+* [`Supported colors`](#supported-colors)
+* [`Notes`](#notes)
+* [`Screenshot`](#screenshot)
+* [`Demo`](#demo)
+* [`Author`](#author)
+
 ## Installation
 
 * Download the script, choice the once for your shell by its extension in the filename.