Update README.md

README.md

@@ -2,14 +2,22 @@
 # Icosa API Client for Unity
 ### based on Google Poly Toolkit for Unity
 
-Original Copyright (c) 2017 Google Inc. All rights reserved.
+#### Original Copyright (c) 2017 Google Inc. All rights reserved.
+#### Additional code and modifications by Icosa Foundation 2024
 
-Additional code and modifications by Icosa Foundation 2024
+## Installation ##
 
 **Install via Unity Package Manager.**
 
+Add the following git URL to your Unity Package Manager:
 
-# Original Readme: Mostly out of date now
+```
+https://github.com/icosa-foundation/icosa-api-client-unity.git#upm
+```
+
+You must install git on your system for this to work.
+
+# Original readme: Mostly out of date now
 
 This is the source code for Poly Toolkit, a plugin for the
 [Unity](http://unity3d.com) engine that allows you to