app.js converted to CoffeeScript and package.js dependencies defined

Two big changes are being made with this commit.  I'm defining all of
the known dependencies for a Sunshine server in package.js.

I have not yet called 'sudo npm install' because I want to illustrate
the conversion of the main applicatoin from JavaScript to CoffeeScript.

app.js has been removed, but comparing it to app.coffee will show a
line by line rosetta stone illustrating the conversion