Updated webtools to 3.20 and used new update site for zipeditor

Change-Id: If2e824c1342c3045cecb3330ec75ae027c4cedf9
Signed-off-by: Andrey Loskutov <loskutov@gmx.de>
diff --git a/releng/org.eclipse.ui.releng/platformUiTools.p2f b/releng/org.eclipse.ui.releng/platformUiTools.p2f
index c531c37..f880460 100644
--- a/releng/org.eclipse.ui.releng/platformUiTools.p2f
+++ b/releng/org.eclipse.ui.releng/platformUiTools.p2f
@@ -224,12 +224,12 @@
     </iu>
     <iu id='org.eclipse.wst.xml_ui.feature.feature.group' name='XML Editor UI' version='0.0.0'>
         <repositories size='1'>
-            <repository location='https://download.eclipse.org/webtools/downloads/drops/R3.19.0/I-latest/repository/'/>
+            <repository location='https://download.eclipse.org/webtools/downloads/drops/R3.20.0/I-latest/repository/'/>
         </repositories>
     </iu>
     <iu id='zipeditor.feature.group' name='ZipEditor' version='0.0.0'>
         <repositories size='1'>
-            <repository location='https://raw.githubusercontent.com/iloveeclipse/plugins/latest'/>
+            <repository location='http://zipeditor.sourceforge.net/update'/>
         </repositories>
     </iu>
     <iu id='com.yourkit.profiler.feature.group' name='Yourkit' version='0.0.0'>