docs: Update install-for-development instructions.

The dev instructions miss few steps making it harder to get started
with contributions.

Fixes #1817

docs/dev/02-making-changes.md

@@ -14,11 +14,20 @@ Here are some tips on how to set up a Karma workspace and how to send a good pul
 
 * Make sure you have a [GitHub account](https://github.com/signup/free).
 * [Fork the repository] on GitHub.
-* Clone your fork.
+* Clone your fork
   ```bash
   $ git clone https://github.com/<your-username>/karma.git
   $ cd karma
   ```
+* Install for development. Use a recent npm version, ignore peerdep warnings
+  ```bash
+  $ npm install
+  $ rm -rf node_modules/karma
+  $ cd node_modules
+  $ ln -s ../ karma
+  $ cd ../
+  $ grunt browserify
+  ```
 
 ## Testing and Building
 - Run the tests via: