Due to the copyright DMCA that WhatsApp/Facebook is sending to all projects that are using "Whatsapp" in their names, and the lack of time to counteract any changes that WhatsApp team is doing in order to make the development of this project hard, I'm abandoning this project.
You can find the latest code in the history (the commit before this), at least until Facebook asks for the removal.
I strongly suggest to switch to another IM client...