Add new constraints to strip out www from subdomain and to redirect to tech subdomain if an invalid one is presented
Add new blog model which has_many articles
Add a before_filter to all requests to find the correct Blog
Refactor MainController#index to find the articles within the current @blog
Add new relation to articles such that it belongs_to a Blog
Refactor sidebar to only show the tech aspects of it when the current @blig.title is Tech
Build seed data for blog