Ignore log files.
Home page is properly templated.

Files affected:

* app/controllers/application_controller: Rewrite comments.
* app/controllers/home_controller.rb: Add explicit, redundant line stating that
  the layout used by this controller is "home".
* app/views/home/index.html.erb: Page is now a proper template that can be
  inserted into a parent layout.
* app/views/layouts/home.html.erb: A simple, base layout that is valid HTML5.
  Can have it's <title> and <body> filled in, and can have stylesheet tags
  added.
* config/routes.rb: Indentation is fixed and file is reorganized.