Merge branch 'master' of github.com:gitlabhq/gitlabhq

CHANGELOG

app/controllers/admin/application_settings_controller.rb

app/controllers/admin/users_controller.rb

app/controllers/application_controller.rb

app/controllers/profiles/emails_controller.rb

app/finders/issuable_finder.rb

app/helpers/milestones_helper.rb

app/models/application_setting.rb

app/models/email.rb

app/models/user.rb

app/views/admin/application_settings/_form.html.haml

app/views/profiles/emails/index.html.haml

app/views/shared/_issuable_filter.html.haml

config/initializers/1_settings.rb

..._add_restricted_signup_domains_to_application_settings.rb

db/schema.rb

doc/api/groups.md

doc/api/issues.md

doc/api/merge_requests.md

doc/api/milestones.md