Create root page support.

Creates the files and configurations necessary to begin building the
application's home page, though no content has been added yet.

    $ rails generate controller Welcome
        * app/controllers/welcome_controller.rb
        * app/views/welcome
        * spec/controllers/welcome_controller_spec.rb
        * app/helpers/welcome_helper.rb
        * spec/helpers/welcome_helper_spec.rb
        * app/assets/javascript/welcome.js
        * app/assets/stylesheets/welcome.css
    - The generated files were modified so that they follow the style rules.
    - index.html.haml was added to the welcome view folder.
    - welcome.html.haml was added to the layouts folder.
    - The root path was made to direct to the home page in routes.rb.
    - A function was used to define the site's name in application_helper.rb.
    $ git add .
    $ git commit -F commit-message.txt
    $ git push origin master
Create header and footer.

Fixes the problem of file types listed in .gitignore showing up as untracked
files. The issue was caused by the comments in .gitignore that were on the
same lines as the file type declarations.

    - The comments in .gitignore were put on their own lines.
    $ git rm -r --cached .
    $ git add .
    $ git commit -F commit-message.txt
    $ git push origin master