Update changelog

CHANGELOG.md

@@ -5,12 +5,44 @@ This document describes all the changes made to the *Outgoing Mobility Learning
 starting from its first beta draft version.
 
 
-0.2.0
+0.3.0
 -----
 
 European Student Identifier added to the get response.
 
 
+0.2.4
+-----
+
+Added disclaimer to README.
+
+
+0.2.3
+-----
+
+Renamed files in example scenario.
+
+
+0.2.2
+-----
+
+Some fixes in examples.
+
+
+0.2.1
+-----
+
+* Added missing latest proposal's id requirement.
+* Added default "minOccurs" and "maxOccurs" explicitly.
+* Some fixes in element descriptions.
+
+
+0.2.0
+-----
+
+Simplification of the learning agreement.
+
+
 0.1.0
 -----