Humans_Engine: Geometry of view cones + spectator head should not be hardcoded.

#### Broken rules:
Currently view cones used for Avalue analysis and the spectator's head outline are hard coded in `Create` methods for the `ViewCone` and `Spectator`.

All are 2d Polylines the X and Y coordinates exist as arrays within the code. These should be externalised for transparency / traceability as part of the Quality Assurance in view quality analysis.

#### Suggestions to restore compliance:
These objects should either be placed as objects in a Dataset or created from input parameters.

Dataset option is complicated for the following reasons:
- The Source for each object is different and so each would require an individual Dataset (one Source per Dataset is the current limitation)
- Datasets currently only accept `IBHoMObjects` and the objects in questions are most easily represented as Polylines, collections of Points or numeric collections each would require wrapping.