Use triangle characters instead of +1/-1.
Install better errors.
Add some design to header of show topic page.
Use i18n features for better presentation.
Use sexy links.
Eager load replies authors.
Style the replies list.
Merge branch 'design'

Conflicts:
	app/assets/stylesheets/main.css.scss
	app/assets/stylesheets/topics.css.scss
Fix integration tests.
Use a cache column for score.