### Added
- `L*` rock code in `stratigraphy_style.xml`
- An hourglass cursor when loading features
- Interval plots
- Sample dataset (as a database dump, with a configuration generation script,
and a QGIS project) (#56)
- Station names in column header
- New functionalities for interacting with the plot configuration (add/remove,
display)
- A first documentation, with a tutorial for beginners (#61)
### Modified
- A bit of refactoring regarding data types (from *continuous* to
*cumulative*)
### Fixed
- Touchpad control for horizontal plot (#21)
- `Nodata` value handling
- Style handling for timeseries
- Time scales for dates < 1970
- Ask for plot configuration only for layers with geometry
- Avoid the display of `NULL` formation codes for stratigraphy plot
