Add a .editorconfig file

Author: Heiko Thiel

.editorconfig

@@ -0,0 +1,13 @@
+# EditorConfig file, see https://editorconfig.org
+root = true
+
+[*]
+charset = utf-8
+indent_size = 2
+indent_style = space
+insert_final_newline = true
+tab_width = 2
+trim_trailing_whitespace = true
+
+# Visual C++ Code Style settings
+cpp_generate_documentation_comments = doxygen_slash_star