Notice about formatters and bump will_paginate to 3.0.5 in Readme
Bump kaminari version

Conflicts:
	README.md
Spelling issues and update es translations

Fixes #517
Users should not be able to quote a deleted post

Fixes #518
Fix formatting blockquote test

`bundle exec rspec --seed 3056` was failing; `.post .contents p` was not raising error because other post with `.contents p` was present.

Fixes #521
Forem isn't really changing all that much any more