doc: added a quick "Hello World" example in README
As per issue #786 (closed), added a quick and simple code sample to the build section for new users to test if they built from source correctly.
No source files were modified.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
As per issue #786 (closed), added a quick and simple code sample to the build section for new users to test if they built from source correctly.
No source files were modified.