Building for desktop

[haakonnessjoen]

On a OS X machine with a fresh node-js install (you have not mentioned in the howto that this is a requirement, btw), the following extra commands had to be done:

Before bower install:
sudo npm -g install bower

Before node-pre-gyp command:
sudo npm -g install nw-gyp

Before gulp build:
sudo npm -g install gulp

[haakonnessjoen]

Also, shelljs was required, but not present in package.js