removed useless find* files. Renamed Coin and SoQt so that it matches the system find files and config files

Generalize linear regression code to N-d, use explicit template initialization

See merge request Simox/simox!85

Linear regression 3d

See merge request Simox/simox!84

In this case, we just ignore the torque limit (it's just simulation, so what can go wrong :)

Feature/robot placement paper

See merge request Simox/simox!82