- internal due to moving outdoor worker out of ART

- moved ART worker to OutdoorAcoustics since it is not typed

- created first version of worker and simulator

Adding some missing header impl tokens for gcc, and adding an exception if a worker can't be created due to a missing factory

- finished outdoor result class
- added folders for Urban and ART modules

- now also supports VistaVector3D and ThirdOctaveMagnitudeSpectrum
- now uses includes instead of forward declarations