Create Readme.md

Moved getting started content to another page.

Author: agarcialeon

Getting-Started/Readme.md

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+---
+layout: default
+title: Getting Started
+nav_order: 2
+---
+
+## Getting Started
+
+This repository contains all kind of utilities for Unity from scripts to shaders.
+
+You can [browse this repository](https://github.com/UnityCommunity/UnityLibrary) and find your desired utility or you can [clone this repository](https://help.github.com/articles/cloning-a-repository/) and browse the files:
+
+```bash
+git clone https://github.com/UnityCommunity/UnityLibrary.git
+```
+
+and then open the folder in Unity or you can find useful stuff by browsing awesome [resources](#resources) below.