Add simple form, update static pages

[jendiamond]

Issue https://github.com/jendiamond/railsgirls-signup/issues/19

• Update the form and its styles
• Update the static pages; home, about & faq
• Update the new user page

branch simple-form modified: Gemfile modified: Gemfile.lock modified: app/assets/stylesheets/application.scss modified: app/views/static_pages/about.html.erb modified: app/views/static_pages/home.html.erb modified: app/views/users/_form.html.erb modified: app/views/users/edit.html.erb modified: app/views/users/new.html.erb new file: config/initializers/simple_form.rb new file: config/initializers/simple_form_bootstrap.rb new file: config/locales/simple_form.en.yml new file: lib/templates/erb/scaffold/_form.html.erb