Merge pull request #6 from foxylion/master

Improve README.md

README.md

@@ -1,17 +1,17 @@
 # OSMembrane - The GUI for [osmosis](https://github.com/openstreetmap/osmosis) [![Build Status](https://travis-ci.org/openstreetmap/OSMembrane.svg?branch=master)](https://travis-ci.org/openstreetmap/OSMembrane)
 OSMembrane is a frontend to the Osmosis data processing tool. It helps by grouping tasks in functions and shows a visual representation of the pipeline. Additionally, it features a bounding box chooser and an AutoComplete list of key/key.value lists imported from JOSM.
 
-![screenshot](http://wiki.openstreetmap.org/w/images/thumb/0/09/OSMembraneThumb.png/640px-OSMembraneThumb.png)
+![screenshot](http://wiki.openstreetmap.org/w/images/0/09/OSMembraneThumb.png)
 
 ## Install the current version
 A build of a recent version is always available on GitHub, you can download it [here](https://github.com/openstreetmap/OSMembrane/releases).
 
-To run OSMembrane is [Java 8](https://www.java.com/de/download/) required. After the installation of Java just double click the downloaded file.
+[Java 8](https://www.java.com/de/download/) is required to run OSMembrane. After the installation of Java just double click the downloaded file.
 
 A quick [tutorial](https://github.com/openstreetmap/OSMembrane/blob/master/manual/manual.pdf) on how to use OSMembrane you can find [here](https://github.com/openstreetmap/OSMembrane/blob/master/manual/manual.pdf).
 
 ## Building the application
-The repository contains all necessary files to build the application from scratch. Only a current version of [Apache Maven](https://maven.apache.org/download.cgi) is required. To actually build the application simply run the Makefile.
+The repository contains all necessary files to build the application from scratch. Only a current version of [Apache Maven](https://maven.apache.org/download.cgi) is required. To actually build the application simply run the Makefile. Windows users can use [Vagrant](https://www.vagrantup.com/downloads.html) to get a matching build environment.
 
 ```
 # Installs required custom maven dependencies in the local repository