TODO list

[dlubom]

1. not export first station: 1.0 . 0.0 0.0 0.0
2. GitHub Action - add Survex as integration test
3. export SVG
4. add exporter for Walls
5. add exporter for PocketTopo
6. add more tests
7. Walls importer (SEF)
8. improve/check multi trips export
9. support for 400 grad ?
10. support for feet - length unit ?