add source feature directives for doc.user

Signed-off-by: nickboldt <nboldt@redhat.com>
diff --git a/features/org.eclipse.datatools.doc.user/build.properties b/features/org.eclipse.datatools.doc.user/build.properties
index 60e19e5..9f00df5 100644
--- a/features/org.eclipse.datatools.doc.user/build.properties
+++ b/features/org.eclipse.datatools.doc.user/build.properties
@@ -1,3 +1,7 @@
+source.. = src/
+output.. = bin/
+src.includes = *
+src.excludes = src
 bin.includes = eclipse_update_120.jpg,\
                epl-v10.html,\
                feature.properties,\