added welcome_email_feature
Merge pull request #461 from YaroSpace/welcome_email_feature

Welcome email feature in settings.yml
Refactor spec/views/documents/edit.html.erb_spec.rb
Refactor spec/views/documents/new.html.erb_spec.rb & index.html.erb_spec.rb
Finish refactoring document view specs. 496 specs green, 1 yellow