added comments regarding the compat module

git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@887458 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/dependencymanager/TODO b/dependencymanager/TODO
index ab60490..8cabc21 100644
--- a/dependencymanager/TODO
+++ b/dependencymanager/TODO
@@ -1,6 +1,7 @@
 - compat: 
 
   * Add javadoc; export the compat package using version 2.0.2; import new dm api using version range [3.0.0, 4.0.0)
+  * add suport for ServiceComponent/ServiceComponentDependency classes (but it's only used by the old dm shell).
 
 - core: