Clean up preferences module: remove duplicate resources, fix import/exports and correct javadocs.

git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@607263 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/prefs/pom.xml b/prefs/pom.xml
index a15f659..08d60ce 100644
--- a/prefs/pom.xml
+++ b/prefs/pom.xml
@@ -74,8 +74,8 @@
                             org.osgi.service.prefs;version=1.1
                         </Export-Package>
                         <Private-Package>
-                            org.apache.felix.prefs.*,
-                            org.apache.commons.codec.binary.*
+                            org.apache.felix.prefs.impl,
+                            org.apache.commons.codec.binary
                         </Private-Package>
                         <Bundle-Activator>
                             org.apache.felix.prefs.impl.PreferencesManager