Update README

README.md

-# sp21-cs242-assignment1
+# sp21-cs242-assignment1.0 (UNO)
 
-UNO Game - week 1
+Table of Contents
+-----------------
+
+* [Introduction](#Introduction)
+* [Requirements](#requirements)
+* [Test](#Test)
+
+## Introdution
+
+This is the first part of the UNO MP (CS242@illinois).
+
+It provides the implementation of basic game logics for a **single round** of UNO (deck managing, validating play of all 108 cards in various context).
+
+For specification of functioning, please refer to [the requirement webpage](https://wiki.illinois.edu/wiki/pages/viewpage.action?pageId=528356500).
+
+
+Requirements
+------------
+
+Java JDK
+
+JUnit - IntelliJ
+
+
+## Test 
+
+Comprehensive unit tests cases (totally 22) are provided in the src/Test directory (for IntelliJ) to gurantee the functioning.
+
+Please refer to **ForGrading.doc** for correspondance of functional requirements and unit tests. 
+
+![22 Test Cases](./testcases.png)