Update README.md

Author: AtaTrkgl

README.md

@@ -1,22 +1,35 @@
 # DartCore Utilities
 
+[![openupm](https://img.shields.io/npm/v/com.dartcore.utilities?label=openupm&registry_uri=https://package.openupm.com)](https://openupm.com/packages/com.dartcore.utilities/)
+[![stargazers](https://img.shields.io/github/stars/AtaTrkgl/DartCore-Utilities?color=yellow)](https://github.com/AtaTrkgl/DartCore-Utilities/stargazers)
+[![release](https://img.shields.io/github/v/release/AtaTrkgl/DartCore-Utilities?color=dark%20green)](https://github.com/AtaTrkgl/DartCore-Utilities/releases)
+
 DartCore Utilities is a general purpose package that contains a lot of usefull methods.
 
 [Here](https://github.com/AtaTrkgl/DartCore-Utilities/wiki) is the link to the documentation. 
 
-## Installation
+# Installation
+
+## 1. UPM Git Extension
+
+DartCore packages use git dependencies which the default package manager does not support. You can install the [UPM Git Extension](https://github.com/mob-sakai/UpmGitExtension) package first and then setup this package.
 
 1. Open the package manager.
-2. Click the plus icon on the top left.
-3. Select "Add package from git URL".
-4. Paste "https://github.com/AtaTrkgl/DartCore-Utilities.git".
+2. Click the git icon on the top left.
+3. Paste "https://github.com/AtaTrkgl/DartCore-Utilities.git" to the repo URL.
+4. Install the package.
 
+## 2. Open UPM
 
-## About DartCore
+[OpenUPM](https://github.com/openupm/openupm) is an open-source service for hosting and building open-source Unity Package Manager (UPM) packages. After setting up [OpenUPM Client](https://github.com/openupm/openupm-cli#openupm-cli) you can run the following command to install this package.
+
+```
+>> openupm add com.dartcore.utilities
+```
+
+# About DartCore
 
 DartCore is a modular Unity Package to help you throughout the development of your games. As of now, DartCore consists of 3 packages:
 1. [DartCore.Utilities](https://github.com/AtaTrkgl/DartCore-Utilities)
 2. [DartCore.Localization](https://github.com/AtaTrkgl/DartCore-Localization)
-3. [DartCore.Utilities](https://github.com/AtaTrkgl/DartCore-UI)
-
-It is also recomended to use the [UPM Git Extension](https://github.com/mob-sakai/UpmGitExtension) package to improve the Unity Package Manager's git support.
+3. [DartCore.Utilities](https://github.com/AtaTrkgl/DartCore-UI)