Recommendation is to avoid using the year nomenclature as this
information is already encoded in the git repo. Avoids needing to
repeatly update.
Also updates AUTHORS.txt from current repo with contributor names
The commit only adds the headers and code required by the SpaceMouse
implementation to compile and link. This extract from the 3Dconnexion
SDK is added to the third party directory to allow developers to build without
needing to acquire a cmake enabled version.
Seth Hillbrand
Ian McInerney
Marek Roszko
markus-bonk