Updated _Sidebar (markdown)

_Sidebar.md

@@ -73,6 +73,11 @@
 * [Vocabulary builder](https://github.com/koreader/koreader/wiki/Vocabulary-builder)
 * [Wallabag](https://github.com/koreader/koreader/wiki/Wallabag)
 
+# [User patches](https://github.com/koreader/koreader/wiki/User-patches)
+* [[Overview|https://github.com/koreader/koreader/wiki/User-patches#overview]]
+* [[Installation|https://github.com/koreader/koreader/wiki/User-patches#installation]]
+* [[Available patches|https://github.com/koreader/koreader/wiki/User-patches#available_patches]]
+
 # [Development](https://github.com/koreader/koreader/wiki#hackers)
 * [[Building the emulator|https://github.com/koreader/koreader/blob/master/doc/Building.md]]
 * [[Coding Style|https://github.com/koreader/koreader-base/wiki/Coding-style]]
@@ -83,7 +88,6 @@
 * [[UI Events|http://koreader.rocks/doc/topics/Events.md.html]]
 
 
-
 # [简体中文](https://github.com/koreader/koreader/wiki/KOReader-Wiki-CN)
 
   * [KOReader 手势操作](https://github.com/koreader/koreader/wiki/KOReader手势操作)