Features:
- Player objects on the same page can be used with crossfade
- Reaper OSC replies are utilized to change the player state
- Program version is put as comment on top of configs
- Improved IP handling for helper scripts
Bugfix: 
- Log at filepath_results, Order = unknown if creating backup results (do not know participant number)

Features:
- Choose between MadMapper and VLC as video player
- save_after is not set automatically anymore
Bugfixes:
- csv header for backup file now consistent
- scrollbar (if present) is set to topmost position on clicking next
- set password_file in the editor for a loaded config

Features:   
- Added parameter 'step' to Slider which changes the distance between ticks.    
- Added the possibility to set only certain Slider labels.    
- Slider parameters min/max/start/step can be float now.

Features:
- OSCButton: a button that sends any OSC-command on click
- added DOI

Bugfixes:
- save backup when header of results file is different from the current one
- help requests no longer crash the GUI with MUSHRA questions present

Added the possibility to add images to a questionnaire page.

Added field to save the results after a certain page and not the last.