Reviewed all view specs making them DRY.
Replaced hardcoded URLs and email addressed in mailer views and specs with helper methods.
Renamed env.rb to helpers.rb
Reviewed all controllers to make them DRY. Moved flash matchers related code to the separate module.
Created modules to contain mailer and domain model RSpec matchers.
Extracted should_assign_XXX method from controller spec to the separate matchers file.
Extracted mailer RSpec matchers to the separate file. Moved matchers to the separate folder.
Renamed flash matchers methods.