* Included error checking when opening OCC geometry files
* Attempt to retain face colours even after geometry healing
* Fixed a bug which did not clear face mesh size array when a new geometry was loaded
* More consistent code between STEP and IGES geometry load functions
* Modified the menustat.tcl file to add an entry in the "Special" menu for the colour based boundary properties functionality
* Added the relevant TCL wrapper functions in ngpkg.cpp to enable the above functionality
* Note: The core functionality is implemented in the file "occauxfunctions.cpp"
* Extended the Clipping Planes functionality to the Geometry mode for OCC Geometry
* Added the option to specify the maximum mesh size for each individual face in an OCC Geometry