Initial sketch of YANG runtime API.

Change-Id: I166f877e484284aa7fa75b33d539f74d9835883b
diff --git a/pom.xml b/pom.xml
index a2ae605..b571eea 100644
--- a/pom.xml
+++ b/pom.xml
@@ -38,6 +38,7 @@
         <module>generator</module>
         <module>parser</module>
         <module>plugin</module>
+        <module>runtime</module>
     </modules>
 
     <!-- FIXME this can be removed if/when buck-api is released -->