Update release notes, fixes #82

Author: adangel

ReleaseNotes.md

@@ -13,8 +13,14 @@ This is a minor release.
 
 ### New and noteworthy
 
+*   Marker Icons: Instead of the geometrical figures, the old icons for the PMD markers can
+    be selected again:
+    ![Screenshot of PMD Marker Property Page](https://raw.githubusercontent.com/wiki/pmd/pmd-eclipse-plugin/images/PMDMarkerPriorityIcons.png)
+
 ### Fixed Issues
 
+*   [#82](https://github.com/pmd/pmd-eclipse-plugin/issues/82): Support old PMD icons
+
 ### API Changes
 
 ### External Contributions