tutorial: HelloWorld

Change-Id: Ie19a7749ba028ceda16a2479398645daeb08f277
diff --git a/HelloWorld/manifest.json b/HelloWorld/manifest.json
new file mode 100644
index 0000000..b524bb8
--- /dev/null
+++ b/HelloWorld/manifest.json
@@ -0,0 +1,5 @@
+{
+    "name": "HelloWorld",
+    "description": "HelloWorld draws a circle in the center of a call's video",
+    "version": "1.0.0"
+}
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