V13.3.15 of 14 October 2022

1. User interface:
   - Reorganisation of model configuration file to support direct user browsing.
   Backward compatability maintained.
   - The full use of the graphical display area in Prj is enabled by moving clipping
   from 'eye space' to 'screen space'. This fixes problems relating to drawing
   outside the display area.
   - Added ability in prj to copy obstructions between zones.
   - Revised descriptors for flow component types as used in flow network reporting.
   - Refinement of markdown reporting of model contents and Res-generated tables.
   - New materials and constructions added to respective databases.
   - Added user option to set the assignment of inside and outside surface heat
   transfer coefficients (also available as a simulation options in bps).
2. 3D model manipulation:
   - Extended E2r to work with ESP-r generated Wavefront object files.
   - Added option during export to Wavefront object files to specify if a polygon
   represents the inside, centre or outside face when considering the overall
   thickness of a construction.
3. Miscellaneous:
   - Fixed bug in the topology checker that corrupted surface boundary information.
   - qrun facility removed because it duplicated facilities found elsewhere.
   - Added new topics to the model contents report.
   - Refined Res monthly reports.
   - Updated data structure and interface to thermal bridge facility.
   - Continuing refinement of exemplar models and addition of thermal bridges to
   some models.
   - Various trivial bug fixes.