Install Meteor

Split Node.js stuff to a separate nodejs-app recipe.
Vagrant provisioning for easier stack deployment.
Create and set up a home folder for the nodejs user.

Get rid of the npm HOME env var hack.
Back to the HOME env var hack.
Install meteorite.
Don't update deployer on Vagrant test boxes.
Set the USER and HOME env vars when launching the app process.

Meteor/Meteorite require those.
Better demo npm install description.
Fix the npm install command.
Better (app type agnostic) demo app deployment.
demo repository now an overridable recipe attribute.
Use Telescope as the default demo app.