Added default distance and default minimum distance in calibration section, already recognized by binaural free field renderer. Also a lot of comments

Fixing manual reset problem for all rendering modules when using a virtual user-triggered sound card. Also adding a VDL before FIR filtering in PrototypeGenericPath to support Doppler shifts, smooth delay handling and sound propagation based on FIR filters for various situations (especially outdoors with fast moving sound sources)

WIP on offline simulation feature using virtual sound card, currently only working for binaural free field due to a manual reset impl requirement

WIP on HATO test and implementation in BFF renderer, still jumpy for near-range-limit HATO HRTFs, problem with index layout or input data?

Avoiding a lot of C4512 errors and introducing volume getter with calibration mode from core in all rendering modules

Removing internal sound speed handling and substituting with core-provided homogeneous medium information

Improved VA-wide output formatting, and adding more versatile information on core initialization (renderers, reproductions)

Style

Reverting all cubicspline default switching algorithms to linear, since this is enough quality and there appears to be a bug in the interpolation routine (tbd)

Fixing reset bugs and adding verbose outputs during reset in mono and binaural FF renderer. ActiveListener still a problem, will have to move to versioned scene handling.

Moving from macro-based renderer registry to a procedural registration during core creation for 'internal' renderers.
Also refactoring Freefield to FreeField (or FREEFIELD to FREE_FIELD) and adding some more qualified names to classes, i.e. 'GenericPath' as 'PrototypeGenericPath'.