Better boilerplate proposal

Ok so this is just an idea. Was pretty easy to implement so I thought I might just do PR.
Basically every meteor tutorial starts with "remove generated *.css/*.js/*.html and create client/server folders". 

I don't think that anyone will gonna create an app with if Meteor.isClient and Meteor.isServer inside one file so why not show a good way to do meteor app? 

Opinions are only based on standard meteor special folders.
Thoughts?