Columns: elements names informations are now kept in a memory arena of

adapted size in the header, and added a boolean in the header indicating
whether the values should be evaluated (typically character strings to
be evaluated in Python)

src/obidms.c

@@ -1036,8 +1036,8 @@ obiversion_t obi_import_column(const char* dms_path_1, const char* dms_path_2, c
 	// Create new column
 	column_2 = obi_create_column(dms_2, column_name, header_1->returned_data_type, header_1->line_count,
 								 header_1->nb_elements_per_line, header_1->elements_names, true, header_1->tuples,
-								 new_avl_name, (header_1->associated_column).column_name, (header_1->associated_column).version,
-								 header_1->comments);
+								 header_1->to_eval, new_avl_name, (header_1->associated_column).column_name,
+								 (header_1->associated_column).version, header_1->comments);
 
 	if (column_2 == NULL)
 	{
@@ -1254,6 +1254,8 @@ int obi_import_view(const char* dms_path_1, const char* dms_path_2, const char*
 								0,
 								NULL,
 								false,
+								false,
+								false,
 								NULL,
 								NULL,
 								-1,