Switched changelog to the new format

CHANGELOG.md

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+This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+# Changelog for ??????????????
+
+## [v2.0.0] [r5.0.0] - 
+
+- Switched JSON management to gcube-jackson [#19116]
+- Switched smart-executor JSON management to gcube-jackson [#19647]
+- Refactored code to support IS Model reorganization (e.g naming, packages)
+- Refactored code to support renaming of Embedded class to Property [#13274]
+- Starting to use the new Encrypted property type [#12812]
+
+
+## [v1.3.0] [r4.13.0] - 2018-11-20
+
+- Using resource-registry 2.0.0 APIs [#11949]
+
+
+## [v1.2.0] [r4.9.0] - 2017-12-20
+
+- Creating uber-jar instead of jar-with-dependencies and using new make-servicearchive directive [#10159]
+- Using new APIs signature [#10318]
+
+
+## [v1.1.0] [r4.6.0] - 2017-07-25
+
+- Removed List and Set usage as workaround for OrientDB bug [#9021]
+
+
+## [v1.0.0] [r4.5.0] - 2017-06-07
+
+- First Release [#7666]
+

changelog.xml

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-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE xml>
-<ReleaseNotes>
-	<Changeset component="org.gcube.information-system.is-exporter-se-plugin.1-4-0" date="${buildDate}">
-		<Change>Refactored code to support IS Model reorganization (e.g naming, packages)</Change>
-		<Change>Refactored code to support renaming of Embedded class to Property #13274</Change>
-		<Change>Starting to use the new Encrypted property type #12812</Change>
-	</Changeset>
-	<Changeset component="org.gcube.information-system.is-exporter-se-plugin.1-3-0" date="2018-11-20">
-		<Change>Using resource-regsitry v2 apis #11949</Change>
-	</Changeset>
-	<Changeset component="org.gcube.information-system.is-exporter-se-plugin.1-2-0" date="2017-12-20">
-		<Change>Creating uber-jar instead of jar-with-dependencies and using new make-servicearchive directive #10159</Change>
-		<Change>Using new APIs signature #10318</Change>
-	</Changeset>
-	<Changeset component="org.gcube.information-system.is-exporter-se-plugin.1-1-0" date="2017-07-25">
-		<Change>Removed List and Set usage as workaround fo OrientDB bug #9021</Change>
-	</Changeset>
-	<Changeset component="org.gcube.information-system.is-exporter-se-plugin.1-0-0" date="2017-06-07">
-		<Change>First Release</Change>	
-	</Changeset>
-</ReleaseNotes>