Adds skeleton directory structure.

Here's a rough directory structure that we can use to put our code into. It's split up into two sections: the web directory for all web-based resources (such as the controller and synth web pages) and the server, which will contain the Node.js routing server.

Inside the web directory, there are files for the different control UIs (feel free to create your own or move them around) and for the synth itself. For the purposes of rapid development, you can link to the synth directly and then we'll switch to OSC tonight or tomorrow morning.