Add Tacx Vortex ANT channel type

Signed-off-by: Stefan Schake <schake@embedded.rwth-aachen.de>
Add Tacx Vortex ANT message decoding/encoding

Signed-off-by: Stefan Schake <schake@embedded.rwth-aachen.de>
Split Tacx Vortex requests from client to more closely match Tacx behavior

Signed-off-by: Stefan Schake <schake@embedded.rwth-aachen.de>
Keep track which data page a Tacx Vortex ANTMessage refers to

This ensures we only access initialized fields in the message

Signed-off-by: Stefan Schake <schake@embedded.rwth-aachen.de>
Integrate Tacx Vortex with ANT device logic

Signed-off-by: Stefan Schake <schake@embedded.rwth-aachen.de>
Merge pull request #1213 from stschake/tacxvortex

Basic support for Tacx Vortex trainers