Added Version and CoreService/Manager as an initial outline of a bootstrap coordinator.
diff --git a/core/api/src/main/java/org/onlab/onos/CoreService.java b/core/api/src/main/java/org/onlab/onos/CoreService.java
new file mode 100644
index 0000000..32c36c5
--- /dev/null
+++ b/core/api/src/main/java/org/onlab/onos/CoreService.java
@@ -0,0 +1,15 @@
+package org.onlab.onos;
+
+/**
+ * Service for interacting with the core system of the controller.
+ */
+public interface CoreService {
+
+ /**
+ * Returns the product version.
+ *
+ * @return product version
+ */
+ Version version();
+
+}