Updates readme

Author: acadet

README.md

@@ -1,8 +1,10 @@
+![Logo](http://oscar.adriencadet.com/assets/img/logo-250.png)
+
 # Oscar - A TypeScript test harness [![Build Status](https://travis-ci.org/acadet/oscar.svg?branch=master)](https://travis-ci.org/acadet/oscar)
 
 > Beauty is a form of Genius--is higher, indeed, than Genius, as it needs no explanation.
 
-### Main features:
+### Main features
 
 * Asserting
 * Supports both synchronous and asynchronous tests