Release version 2.2.0

Major features:
* Peer Instruction: A question can now be answered again in a second round.
  To limit the answering time, a countdown timer can be activated.
* Full screen mode: The browser automatically enters full screen mode when
  presenting questions. Additionally, a theme optimized for projections is used
  in this case. The font size can be adjusted.
* Learning analytics: Multiple calculation options for learning progress have
  been introduced.
* Image answers (experimental): Free text answers can now be answered with an
  image (the feature has to be enabled explicitly for a question).
* Performance: A lot of improvements have been introduced to make the UI more
  responsive

Minor features and changes:
* Simplified text formatting: A formatting tool bar has been introduced.
* Video embedding from YouTube and Vimeo
* Code syntax highlighting in questions
* Hint & solution for questions
* Session info: The previously with public pools introduced session info is now
  available for all sessions.
* QR Code: It is now possible to generate and display QR Codes for a sessions
  directly from ARSnova Mobile.
* Role switching: Switching between speaker to student views is now possible
  without leaving a session or logging out.
* Embedded pages: External websites are now embedded in ARSnova (if possible)
  instead of opening a new browser tab.
* Usability improvements and bug fixes

Bugfixes:
* Fixed a rendering bug with latest Chrome versions (43+) which made question
  answering impossible.

This version is brought to you by:
Project management: Klaus Quibeldey-Cirkel
Lead programming: Andreas Gärtner, Daniel Gerhardt, Christoph Thelen
Contributions: Simon Hauck, Marcel Hedderich, Dominik Hikade, Nicola Justus,
Tom Käsler, Maximilian Klingelhöfer, Franciska Periša, Simeon "EinBaum" Perlov,
Björn Pfarrreis, Sviatlana Plakhina, Dennis Schönhof, Katharina Staden,
Max Steinwachs

Release version 2.3.0

Major features:
* Use case scenarios: To simplify the user interface, question types and
  functions are now enabled on a per session basis. Unused features are
  hidden and no longer distract from the workflow.
* Improved UI theming: Theming has been simplified by providing a
  variables file. Deep knowledge of CSS, SCSS and ARSnova's HTML
  structure is no longer required for color adjustments. Additionally,
  the default theme got a refresh.
* Message of the Day: It is now possible to display a message to all
  users per session or globally.
* New question type "Ask the audience": four options A, B, C, and D
  without question text.
* CSV export/import (experimental): Questions and their answers can now
  be exported to a simple CSV file.

Minor features and changes:
* Improved formatting: New formatting options (GitHub Flavored Markdown)
  are available.
* New templates for opinion polls have been added.
* Chrome's "pull-to-refresh" action is now longer triggered in text
  fields.
* Text selection in multiline editors no longer triggers scrolling.
* It is now possible to freeze live feedback.
* Image uploads except for hot spot questions and image answers are no
  longer available. Images on external servers can still be embedded via
  Markdown.
* Usability improvements and bug fixes

Bug fixes:
* Image scaling and rotation have been fixed.

Changes for developers:
* The `grunt run` build task has been improved to display important
  messages by Sencha Cmd. Verbose output for debugging purposes is
  displayed when parameter `-v` is used.
* Maven builds are now deprecated for the frontend. Please use Grunt
  instead.
* Version information is now saved with builds and is accessible via
  `Version` controller.

**This version is brought to you by:**
Project management: Klaus Quibeldey-Cirkel
Lead programming: Andreas Gärtner, Daniel Gerhardt, Tom "tekay" Käsler,
Christoph Thelen
Contributions: Daniel Haag (University of Innsbruck), Juan Markowich,
Marco Schäfer

Release version 2.3.1

Bugfixes:
* Fixes a regression leading to incorrect detection of Safari.

Release version 2.3.2

This patch release improves browser compatibility.

Minor changes:
* Improved browser detection

Bugfixes:
* Fixes scrolling with touch devices for Edge browser
* Fixes numerous usability and rendering errors with Internet Explorer

Release version 2.3.3

Bug fixes:
* Fixes JavaScript errors occuring with `question.answer-option-limit`
  set to values other than `8`.
* Fixes charset errors in German i18n of dates.
* Fixes opening of external pages (blog, privacy, legal info) when they
  can not be embedded in Firefox

Release version 2.4.0

Major features:
* Slides: A new content format without any answer options has been
  added.
* Interactive keynote: A new use case including the 'slides' format has
  been added. It replaces the 'All-inclusive' use case.

Minor features and changes:
* An overlay showing count of new student's questions and average
  feedback has been added to presentation mode.
* Student's questions and comments are now directly displayed instead of
  a list of subjects.
* JSON export and import now include session info and feature settings.

Bug fixes:
* Editor buttons now add new lines when necessary to produce correct
  Markdown.
* New lines in Markdown content are now displayed as is.
* All question formats apart from 'grid' are now correctly exported to
  CSV.

Changes for developers:
* Initial support for localization variations has been implemented.

Release version 2.4.1

Bug fixes:
* Theme variable `tabbar-button-icon-color` works again.

Release version 2.4.2

Bug fixes:
* Fixed a JavaScript `TypeError` which occured when presenting questions
  with enabled slides feature and required a reload to make ARSnova
  usable again.
* Button descriptions now adjust correctly when slides are enabled.
* ARSnova no longer hangs because of a `ReferenceError` when loading for
  the first time on slow connections.

Release version 2.4.3

Bug fixes:
* Buttons of the question format bar are now correctly shown or hidden
  when switching use cases.
* Flipping of flashcards is no longer inhibited.

Release version 2.3.4

Bug fixes:
* Fix layout problems in Firefox 49+
* ARSnova no longer hangs because of a `ReferenceError` when loading for
  the first time on slow connections.

Release version 2.4.4

Bug fixes:
* Fix layout problems in Firefox 49+

Release version 2.4.5

Bug fixes:
* Fixed button visibility problems in Chrome 57+.
* Fixed skipping of login service selection (if only one is enabled for
  the role).
* Fixed activation toggling of votes for all preparation questions.

Release version 2.5.0

Major features:
* Evaluation of free text answers
* The flashcards UI has been overhauled. They are now handled separately
  from questions.
* Question duplication and import from other sessions

Minor features and changes:
* The number of comments is now shown in presentation mode
* New use case including only comments
* Export of answer statistics to CSV format
* Export of questions to arsnova.click format
* Export/import of flashcards to/from arsnova.cards format
* Proxy support for WebSocket connections
* Reduced the amount of API requests sent
* Usability improvements and bug fixes

With this release we have completely overhauled our
[documentation](README.md). Additionally, we now provide
[Docker images](https://github.com/thm-projects/arsnova-docker/).

Release version 2.5.1

* Direct session login via link or QR Code now works reliably.
* MotDs are now listed and created for the correct session when MotDs
  for another session were managed before.

Release version 2.5.2

Minor improvements:
* Slightly adjusted badge colors to be more consistent
* Correctly show/hide items in legend based on existing data and
  selected use case

Bug fixes:
* Fix logout failing when application cache is unaccessable
* Username for non-guests is now removed from configuration on logout

Release version 2.5.3

Browser compatibility:
* Added a workaround to circumvent a bug in Chrome 65 and 66. This
  browser bug causes serious navigation issues.

Bug fixes:
* Updated session MotDs can now be saved.