Add TrackerSpin virtual plugin#519

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gfrolov wants to merge 5 commits intomasterfrom

Commits on Jan 10, 2017

add TrackerSpin virtual plugin
Georgiy Frolov
committed
add TrackeSpin README, add logic to only detect one device, update osvr_server_config
Georgiy Frolov
committed

Commits on Jan 18, 2017

remove TrackerSpin from default plugins and move it to example plugins
Georgiy Frolov
committed
add position in device descriptor because the plugin reports full pose (position and orientation)
Georgiy Frolov
committed

Commits on Nov 16, 2017

Merge branch 'master' into trackerSpin
rpavlik
authored