Update of links in Development page

- corrected link to scijava tutorials;
- added link to the Writing ImageJ2 Plugins: A Beginner's Perspective.

Author: ekatrukha

_pages/develop/index.md

@@ -10,7 +10,8 @@ This page provides an overview of ImageJ2 from the perspective of software devel
 ## Quick start
 
 -   **Learn to write [scripts](/scripting)** from the [tutorial notebooks](/tutorials/notebooks).
--   **Learn to use ImageJ2 from Java** with the [tutorial Maven projects](https://github.com/imagej/tutorials/tree/-/java).
+-   **Learn to use ImageJ2 from Java** with the [tutorial Maven projects](https://github.com/imagej/tutorials/tree/master/java).
+-   **Read an introduction** about [Writing ImageJ2 Plugins: A Beginners Perspective](https://imagej.net/news/2016-04-19-writing-imagej2-plugins-a-beginners-perspective).
 
 ## What is ImageJ2?