IfcBlender: provide a temporary workaround for interfacing from a UCS2 Blender Python

A real solution could be to compile IfcGeom into a dynamic library and compile multiple versions of _IfcImport.so for different configurations which are selected based on sys.maxunicode
Another alternative would be not to rely on strings when exchanging textual data but vectors of int that contain the string character codes

src/ifcgeom/IfcGeomObjects.cpp

@@ -435,6 +435,9 @@ const IfcGeomObjects::IfcGeomObject* IfcGeomObjects::Get() {
 bool IfcGeomObjects::Init(const std::string fn) {
 	return IfcGeomObjects::Init(fn, 0, 0);
 }
+bool IfcGeomObjects::InitUCS2(char* fn) {
+        return IfcGeomObjects::Init(fn+1, 0, 0);
+}
 bool _Init() {
 	shapereps = Ifc::EntitiesByType<Ifc2x3::IfcShapeRepresentation>();
 	if ( ! shapereps ) return false;

src/ifcgeom/IfcGeomObjects.h

@@ -116,6 +116,7 @@ namespace IfcGeomObjects {
 	};
 
 	bool Init(const std::string fn);
+	bool InitUCS2(char* fn);
 	bool Init(void* data, int len);
 	bool Init(const std::string fn, std::ostream* log1= 0, std::ostream* log2= 0);
 	bool Init(std::istream& f, int len, std::ostream* log1= 0, std::ostream* log2= 0);