README-en.md edited online with Bitbucket

README-en.md

@@ -110,6 +110,7 @@ The following figures illustrate the exchanges that are done by level 1, 2 and 3
 
 
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@@ -122,6 +123,7 @@ The following figures illustrate the exchanges that are done by level 1, 2 and 3
 
 
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