Various enhancements:

* Replace Reeder.load! with Lotus::Model#load!
* Use Lotus::Model DSL for mapping
* Move mapping to config/mapping
* Remove Repositories namespace, instead use Reeder namespace
* Move Reeder::Web route to routes file
* Create Reeder::Container router
* Move web under apps/
* RESTful resource :articles
Merge pull request #8 from joneslee85/refactor

Too extreme enhanements