Update README.asciidoc

Author: etiennebrosse

README.asciidoc

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+ image:readme//logo-modelio-v4.png"[] 
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 = **Attack Tree Designer**
 
 **Attack Tree Designer** is an Open Source Modelling Tool conceived for designing link:https://en.wikipedia.org/wiki/Attack_tree[**Attack Trees**]. **Attack Tree Designer** is deployed as a module in link:https://www.modelio.org/[**Modelio**] modelling environent.
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 == **Dependencies**
 
 * link:http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html[Java 8 JDK] 
-* link:https://github.com/ModelioOpenSource/Modelio/[Modelio 4.1]        image:readme//logo-modelio-v4.png"[]  
+* link:https://github.com/ModelioOpenSource/Modelio/[Modelio 4.1]       
 
 == **Contributing**