Adding demo yang models and working on yang model packaging.

Change-Id: Ief674880920cf6165c863909298eb4fa6dd3fb64
diff --git a/models/demo/BUCK b/models/demo/BUCK
new file mode 100644
index 0000000..6b4456a
--- /dev/null
+++ b/models/demo/BUCK
@@ -0,0 +1,57 @@
+COMPILE_DEPS = [
+  '//lib:CORE_DEPS',
+]
+
+
+# The following will be wrapped into a macro to be used something like this:
+#
+# yang_model (
+#   app_name = 'org.onosproject.models.foobar',
+#   title = 'Demo YANG Model',
+#   url = 'http://onosproject.org',
+# )
+
+
+YANG_TOOLS = [
+  '//apps/yang:onos-apps-yang',
+  '//lib:onos-yang-runtime',
+]
+
+yang_library(
+  name = 'yang',
+  srcs = glob(['src/**/*.yang']),
+)
+
+genrule(
+  name = 'schema',
+  srcs = [ ':yang#srcs' ],
+  cmd = '$(location //buck-tools:yang-schema) $OUT $SRCS',
+  out = 'yang'
+)
+
+genrule(
+  name = 'registrator',
+  srcs = glob(['src/**/*.yang']),
+  cmd = '$(location //buck-tools:yang-registrator) $OUT org.onosproject.models.demo $SRCS',
+  out = 'YangModelRegistrator.java'
+)
+
+osgi_jar(
+  name = 'onos-models-demo',
+  # srcs = [ ':registrator' ],
+  srcs = [ ':yang#srcs', ':registrator' ],
+  deps = COMPILE_DEPS + YANG_TOOLS,
+  resources = [ ':schema' ],
+  resources_root = ".",
+  do_checkstyle = False,
+  do_javadocs = False,
+)
+
+onos_app (
+  app_name = 'org.onosproject.models.demo',
+  title = 'Demo YANG Model',
+  category = 'Model',
+  url = 'http://onosproject.org',
+  description = 'Demo YANG model extension.',
+  required_apps = [ 'org.onosproject.yang' ],
+)