Add .editorconfig file to configure supporting editors to use proper whitespaces for indentation
diff --git a/src/.editorconfig b/src/.editorconfig
new file mode 100644
index 0000000..8abf0ef
--- /dev/null
+++ b/src/.editorconfig
@@ -0,0 +1,5 @@
+root = true

+

+[**.{cpp,h}]

+indent_style = space

+indent_size = 4