Hotfix since 0.5.2 release candiate:
* tickets: fix bug that allow index of other users
Pull request #167 from azul/feature/i18n-for-ticket-system:
* fix flash for creating anonymous tickets
* adopt tests to new translations
* destroy_btn helper method
* move users key into layouts scope so it does not conflict with users
scope
* add btn helper for link_to with .btn
* remove icon_color variable - yagni
* sorting translation keys some
* navigation works with empty locale selected
* tickets: structure i18n
* flash_for with_errors option displays error messages
* remove unused bold helper and instead sanitize flash
* Controller#flash_for instead of FlashResponder
* split up and refactor TicketController#update
* separate tests for the ticket list from main controller test
* splitting up long functional test case
* move comment related tests out of TicketControllerTest
* use i18n.missing_translations
Pull request #168 from azul/bugfix/fix-login-validations:
* clearify identity validations
* ensure User#reload returns self
* hand on errors from Email to Identity to User
* catch corner cases of account creation
* adopt tests to new error messages for identities
* allow changing the user_id on an identity
* ensure identity is cleared on user.reload - fixes test
* use Identity for testing login availability
Pull request #163 from azul/feature/3398-save-hashed-token
* hash token with sha512 against timing attacs #3398
Pull request #165 from azul/feature/cert-fingerprints
* change from GET to POST for certs
* store fingerprints with timestamp
* store cert fingerprint with main user identity
* SmtpCertsController, routes and tests
* fix Email so User.new.valid? does not crash
* basic integration test for cert API
* calculate cert fingerprints to store for leap_mx
Pull request #166 from elijh/feature/footer
* better detection if price link should be shown in the footer
Pull request #162 from azul/feature/3295-custom-error-pages
* little bit of documentation
* i18n for error pages
* custom error pages for 404 and 500 errors