Mention the fact that Devise does not provide 'name' column by default (partially fixes #495)

Fixes #498
Add Airesis to sites using Forem list
Reversible migrations

Fixes #504
Ability to remove users from groups

Fixes #503
Russian translation consistency

Fixes #501
Use Kaminari configuration

Fixes #505
Add test_app alias so I don't get confused between forem + Spree
bump kaminari to 0.15.0

Fixes #506
Remove the cancer that is the protected_attributes gem
Only include CapybaraExt in Capybara tests
Use double, not stub, inside forum_spec.rb

stub is deprecated
Test for removing users from groups
Fix confirmation message in groups/show showing a deprecation warning
added a arabic localization yml

Fixes #509
Windows platform should be specified in Gemfile to install required gems in testing env

Fixes #507
Assets setup notice in Readme

Fixes #502
Notice about formatters and bump will_paginate to 3.0.5 in Readme

Conflicts:
	README.md
Bump kaminari version
Spelling issues and update es translations

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

Fixes #518