Cleaning up and re-organizing javadocs; it's time to start splitting this up more.

Change-Id: If8752593ff30c9afbd43638590cff81fbcb80e7d
diff --git a/docs/external-apps b/docs/external-apps
new file mode 100644
index 0000000..b2e4d89
--- /dev/null
+++ b/docs/external-apps
@@ -0,0 +1,5 @@
+org.onosproject.dhcp
+org.onosproject.cpman
+org.onosproject.olt
+org.onosproject.openstackswitching
+org.onosproject.routing