[site] custom lang support tutorial stub + contents

_SUMMARY.md

@@ -40,5 +40,6 @@
     * [List and Tree Controls](lists_and_trees.html)
     * [Miscellaneous Swing Components](misc_swing_components.html)
 * [Custom Language Support](custom_language_support.html)
+    * [Custom Language Support Tutorial](cls_tutorial.html)
 
 

cls_tutorial.md

@@ -0,0 +1,46 @@
+---
+title: Custom Language Support Tutorial
+---
+
+<!--
+INITIAL_SOURCE https://confluence.jetbrains.com/display/IDEADEV/Supporting+multiple+carets
+-->
+
+# {{ page.title }}
+
+In this tutorial we will add basic support for
+[.properties](http://en.wikipedia.org/wiki/.properties)
+language and it's usages within Java code.
+
+We will generate parser and PSI elements using
+[Grammar-Kit](https://github.com/JetBrains/Grammar-Kit) plugin.
+The lexer class will be generated with
+[JFlex](http://jflex.de/).
+
+This a step-by-step tutorial and it requires performing every step:
+
+*  [Prerequisites](TODO)
+*  [Language and File Type](TODO)
+*  [Grammar and Parser](TODO)
+*  [Lexer and Parser Definition](TODO)
+*  [Syntax Highlighter and Color Settings Page](TODO)
+*  [PSI Helpers and Utilities](TODO)
+*  [Annotator](TODO)
+*  [Line Marker Provider](TODO)
+*  [Completion Contributor](TODO)
+*  [Reference Contributor](TODO)
+*  [Find Usages Provider](TODO)
+*  [Folding Builder](TODO)
+*  [Go To Symbol Contributor](TODO)
+*  [Structure View Factory](TODO)
+*  [Formatter](TODO)
+*  [Code Style Settings](TODO)
+*  [Commenter](TODO)
+*  [Quick Fix](TODO)
+
+The final code can be found on
+[GitHub](http://github.com/cheptsov/SimplePlugin).
+
+For additional information check out the
+[official documentation](http://confluence.jetbrains.net/display/IDEADEV/PluginDevelopment)
+