specify EE in manifest.mf files and classpath (with work-around for access rule bug)
diff --git a/bundles/org.eclipse.wst.xml.ui/META-INF/MANIFEST.MF b/bundles/org.eclipse.wst.xml.ui/META-INF/MANIFEST.MF
index 13e8563..b172ddc 100644
--- a/bundles/org.eclipse.wst.xml.ui/META-INF/MANIFEST.MF
+++ b/bundles/org.eclipse.wst.xml.ui/META-INF/MANIFEST.MF
@@ -57,3 +57,4 @@
  org.eclipse.wst.validation;bundle-version="[1.1.0,1.2.0)",
  com.ibm.icu;bundle-version="[3.4.4,4.0.0)"
 Eclipse-LazyStart: true
+Bundle-RequiredExecutionEnvironment: J2SE-1.4