Update README.md

Author: gjmh-unikent

README.md

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 # Baum
 
-[![Build Status](https://travis-ci.org/etrepat/baum.png?branch=master)](https://travis-ci.org/etrepat/baum)
-
 Baum is an implementation of the [Nested Set](http://en.wikipedia.org/wiki/Nested_set_model)
-pattern for [Laravel 4's](http://laravel.com/) Eloquent ORM.
+pattern for [Laravel 5's](http://laravel.com/) Eloquent ORM.
 
 ## Documentation