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

Fixes #498
Russian translation consistency
Assets setup notice in Readme
Ability to remove users from groups
Reversible migrations
Add Airesis to sites using Forem list
Use Kaminari configuration
Backticks for file names
Merge pull request #504 from mauriciopasquier/fix-migrations

Reversible migrations
Merge pull request #503 from bodrovis/remove_users_from_groups2

Ability to remove users from groups
Merge pull request #501 from bodrovis/russian_translation_fixes

Russian translation fixes
Merge pull request #505 from mauriciopasquier/kaminari_page_method

Use Kaminari configuration if present
Use double because stub is deprecated
Add test_app alias so I don't get confused between forem + Spree
Only include CapybaraExt in Capybara tests
bump kaminari to 0.15.0
Merge pull request #506 from zzak/patch-1

bump kaminari to 0.15.0
Fix confirmation message in groups/show showing a deprecation warning
Test for removing users from groups
added a arabic localization yml

Fixes #509