Add How to use to README.md (#27)

README.md

@@ -9,6 +9,13 @@ csharp, unity client for ezyfox server
 
 [https://youngmonkeys.org/ezyfox-csharp-client-sdk/](https://youngmonkeys.org/ezyfox-csharp-client-sdk/)
 
+# How to use?
+* Since our project depends on `Newtonsoft Json` unity package, you first need to add it to your Unity project in either one of the following ways:
+   - Select `Window` >> `Package Manager` >> :heavy_plus_sign: icon >> `Add package from git URL` >> Add `com.unity.nuget.newtonsoft-json` to URL field >> Add
+   - Edit the `manifest.json` file in the `Packages` folder of your Unity project and add "com.unity.nuget.newtonsoft-json": "3.0.2"
+* Clone/copy this repository into your unity project
+* Your Unity project can now start using scripts from this repository
+
 # Code Example
 
 **1. Import**
@@ -92,4 +99,4 @@ while(true)
 # Used By
 
 1. [hello-csharp](https://github.com/tvd12/ezyfox-server-example/tree/master/hello-csharp)
-2. [space-shooter](https://youngmonkeys.org/asset/space-shooter/)
+2. [space-shooter](https://youngmonkeys.org/asset/space-shooter/)