Added
-----

- organisation administration (edit and delete)
- sync user account data to ticket database also upon account validation
- strike-through rendering to `MarkdownRenderer`
- image attributes extension for `MarkdownRenderer`
- error handling middleware for better error logging

Changed
-------

- better error message if user or organisation cannot be displayed
- Refactoring: merge tickets module into hub module
- base uri for organisation operations
- scalafix configuration update
- documentation for CSRF protection on failure handler to reflect correct
  behaviour
- documentation wording

Removed
-------

- now obsolete workaround for twirl and scala-xml from build file
- unused packaging settings from build file

Fixed
-----

- broken source tarball downloads
- set correct password reset link in email
- discarded non unit value in `DarcsCommandsTest`
- fatal warning in the `MarkdownRenderer`
- missing logback on html-utils