update changelog to v1.4

CHANGELOG.md

@@ -1,5 +1,101 @@
 # Changelog
 
+## Changelog v1.4
+
+#### User Experience
+* Performance (Reduced amount of calls on connection testing and less nickname-traffic for students)
+* Question-View: The view starts in format mode, the preview-button is moved to the markdown-bar.
+* The number of current votes is displayed during voting, not the number of all session-members.
+* Added Cookie-consent (a law requirement, Piwik is using a cookie, our App is not).
+* All Splashscreens got a close-button in the upper right.´
+* Removed function which are not usable on an iPad (Import and Fullscreen).
+* Improve theme selection presentation / reduce amount of themes.
+
+#### Bugfixes
+* Messed up sessions after export (import fails)
+* Joining bug: "All nicknames already taken"
+* Fixed leaderboard bugs (with survey and ranged questions)
+* Missing hooks from some views (leaderboard) were added.
+
+This version is brought to you by:
+Project management: Klaus Quibeldey-Cirkel
+Lead programming: Tjark Wilhelm Hoeck, Christopher Fullarton, Daniel Gerhardt
+
+
+## Changelog v1.3.1
+
+#### Bugfixes
+* Imports of old sessions might failed due to database changes. With v1.3.1, they can be imported again.
+* The internet connection-test will only fire one XHR-Request to stress the internet link as less as possible.
+* Improvements of the user appcache to reduce internet traffic.
+* Fixes an error where survey-questions are always validated as wrong.
+
+This version is brought to you by:
+Project management: Klaus Quibeldey-Cirkel
+Lead programming: Tjark Wilhelm Hoeck, Christopher Fullarton, Daniel Gerhardt, Tom Käsler
+
+
+## Changelog v1.3
+
+#### Features
+* New Question formats:
+ - Yes-No Single-Choice question
+ - True-False Single-Choice question
+ - Free text question (response is correct in accordance with the provided sample)
+* Connection quality indicator
+* Predefined nickname-lists (categories)
+
+#### UX
+* Media elements are shown within the app (they were openend in a new tab before)
+* French and spanish translations were reviewed by (human) translators and are leaving the beta-stage
+* There are a lot of new themes you can play around with.
+* On creating or editing a new session, you are now guided by a breadcrump.
+
+#### Bugfixes
+* The reading-confirmation-splashscreen was improved, the delay (up to 8 seconds) shouldn't be seen again.
+* More bugfixes. See the git log for further informations.
+
+This version is brought to you by:
+Project management: Klaus Quibeldey-Cirkel
+Lead programming: Tjark Wilhelm Hoeck, Christopher Fullarton, Daniel Gerhardt, Tom Käsler
+
+
+## Changelog v1.2.1
+
+#### Features
+* New question type: Ranged questions.
+* Change hashtag-name on importing sessions with already taken hashtags
+
+#### UX
+* Style-tweaks for very small devices
+
+#### Bugfixes
+* Fix an session-error where the instructor wasn't able to start the quiz.
+
+This version is brought to you by:
+Project management: Klaus Quibeldey-Cirkel
+Lead programming: Tjark Wilhelm Hoeck, Christopher Fullarton
+
+
+## Changelog v1.2
+
+#### Features
+* Choosable designs
+* Validation summary
+* Finish polling if all students have send a response
+
+#### UX
+* new Footer
+* new Header
+
+#### Bugfixes
+* A lot of bug fixes. See the git log for further informations.
+
+This version is brought to you by:
+Project management: Klaus Quibeldey-Cirkel
+Lead programming: Tjark Wilhelm Hoeck, Christopher Fullarton
+
+
 ## 1.1.0
 
 #### Features
@@ -22,9 +118,9 @@
 
 Furthermore, we improved the jshint-rules for a better code quality and refactored the project scaffolding for a better maintainability.
 
-This version is brought to you by: 
-Project management: Klaus Quibeldey-Cirkel 
-Lead programming: Tjark Wilhelm Hoeck, Christopher Fullarton, Tom "tekay" Käsler, Daniel Gerhardt 
+This version is brought to you by:
+Project management: Klaus Quibeldey-Cirkel
+Lead programming: Tjark Wilhelm Hoeck, Christopher Fullarton, Tom "tekay" Käsler, Daniel Gerhardt
 Contributions: Nina Isensee, Curtis Adam, Tobias Brähler, Adrian Tim Guthmann, Yannick Lehnhausen
 
 
@@ -42,7 +138,7 @@ First version including the main features:
 * Support for multiple questions
 * Session management in local storage
 
-This version is brought to you by: 
-Project management: Klaus Quibeldey-Cirkel 
-Lead programming: Tjark Wilhelm Hoeck, Tom "tekay" Käsler, Daniel Gerhardt 
+This version is brought to you by:
+Project management: Klaus Quibeldey-Cirkel
+Lead programming: Tjark Wilhelm Hoeck, Tom "tekay" Käsler, Daniel Gerhardt
 Contributions: Christopher Fullarton, Daniel Henkel, Maurice Wallbott, Anton Schwarz, Kevin Weigand, Kevin Linne, Tim Strietzel, Michael Sann, Tobias Viehmann