Major changes

These major changes were to address the issue of routes being inherited, or in response to this fix

Remove ApplicationController from app/controllers directory to prevent routes being defined in it (since the main cause of route inheritance is from the fact that each controller subclasses ApplicationController)
Add MainController which now effectively works the same way as the old app/controllers/application_controller.rb - it is rooted at /
Add MainHelper which is the helper module for MainController only. ApplicationHelper still exists, and is still used for defining methods which should be available to all subclassing controllers
Change maintenance mode to use before filters to redirect to MainController's /maintenance method. Additionally, maintenance mode and the maintenance route are now both configured in app.rb
Change asset pipeline setup to only define /assets/* at the root (MainController) rather than relative to each controller
Prevent app/controllers/main_controller.rb from being deleted through the CLI

Other major changes

Add render_static method as an abstraction for send_file, to avoid having to type send_file File.join(settings.public_folder, file)
Change ordering of require directives in eucalypt/load.rb
Move asset pipeline configuration into the library (to avoid cluttering the application)

Minor changes

Add a default index page if / is not defined in MainController
Change default logging configurations
- Lumberjack::Severity::DEBUG is now the default severity for the development environment
- Remove unnecessary Lumberjack::Severity::INFO specification for the production environment, since set :logging defaults to this severity anyway
Delete unused eucalypt/guard.rb file
Change default specs to all be true
Remove bundle exec from Procfile since the eucalypt launch command already executes rackup under bundle exec