SEBA-497 delayering, Makefile, and tox for vrouter

Change-Id: I6fb42836eeb9a3ee4457933db8a1094db8af53af
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..e039eea
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,3 @@
+xossynchronizer~=3.0.1
+xosapi~=3.0.1
+xoskafka~=3.0.1