CSVLine: Added IsEmpty() method
Driver: Added basic OpenVario driver
OpenVario: Added static pressure support
OpenVario: Added dynamic pressure support
OpenVario: Added total pressure support
OpenVario: Added temperature support
OpenVario: Added airspeed support
OpenVario: Added TE vario support
Device driver for Wharington Smith Instruments Vaulter
Vaulter: add more documentation, wind support
Vaulter driver: more documentation comments
Vaulter driver: unit test