Release v1.1.0

- Interaction via WebSockets
- Voting on comments by participants
- New attributes: read, favorite, correct
- Search function
- Sorting and filtering
- Presentation mode with color indication for participants
- Threshold to hide negative comments from participant and lecturer

- Add Progressive Web App functionality for a 'native app' feeling
- Theme Manager with 4 Themes to chose from
- Designimprovements