specs for UserMailer/-Observer
group spec capybara cannot let user to be logged in
grouping_observer sends emails to participants on request/acception/abortion
guard set up
added user specs
grouping observer specs
specs for groupmailer
group_mailer specs
mailbox bug
group mailer templates added
notifications added
groupmailer views and specs updated
templating
notifications shown up in frontend nicely
group mailer polishing
impressions for groups, items, users; notifications will be read via impressions