Added bootstrap.css files + modified index.html.erb
	modified:   Gemfile
	modified:   Gemfile.lock
	deleted:    app/assets/stylesheets/scaffolds.css.scss
	modified:   app/views/posts/index.html.erb
	new file:   vendor/assets/javascripts/application.js
	new file:   vendor/assets/javascripts/bootstrap.js
	new file:   vendor/assets/javascripts/bootstrap.min.js
	new file:   vendor/assets/javascripts/site.min.js
	new file:   vendor/assets/stylesheets/bootstrap.css
	new file:   vendor/assets/stylesheets/bootstrap.min.css
	new file:   vendor/assets/stylesheets/site.css
	new file:   vendor/assets/stylesheets/site.min.css