this release changes:
- A new app icon and symbolic! (based on @bertob's design and with his help. Thanks a ton!)
- long awaited: write and edit text with the typewriter
- pdf import dialog with the added option to import aligned with the document pages ( one pdf page per document page )
- import bitmap images (e.g. screenshots) from the clipboard (thanks @RickStanley!)
- proportial shapes / input constraints (thanks @sei0o!)
- additional selector modes: apiece, intersecting path
- improved workspace browser, added sidebar to select between different workspaces (inspired by the `Paper` app)
- mark underneath other strokes with the 'Marker' brush style
- bug fixes