updated README: added lines under titles

README.md

@@ -1,4 +1,5 @@
 # What is OpaStart ?
+--------------------
 
 [OpaStart](https://github.com/Aqua-Ye/OpaStart) is an MVC template project to kick start your [Opa](http://opalang.org) webapp.
 
@@ -7,16 +8,19 @@ It is designed to respond to the need from small to big projects.
 Inspired by HTML5 Boilerplate, and personal experience in Opa dev :)
 
 # Reqirements
+-------------
 
 - [Opa](https://github.com/MLstate/opalang)
 - [RECESS](https://github.com/twitter/recess)
 
 # What does OpaStart include/import by default ?
+------------------------------------------------
 
 - [Twitter Boostrap](https://github.com/twitter/bootstrap)
 - [Modernizr](https://github.com/Modernizr/Modernizr)
 
 # How to use OpaStart ?
+-----------------------
 
 - Fork the repo
 - Adapt to your needs