add .editorconfig file

This will help to increase code consistency.

.editorconfig

@@ -0,0 +1,16 @@
+# http://editorconfig.org
+
+ root = true
+
+ [*]
+ indent_style = space
+ indent_size = 2
+ trim_trailing_whitespace = true
+ insert_final_newline = true
+ charset = utf-8
+ end_of_line = lf
+
+ [{docs,reports}/**]
+ insert_final_newline = ignore
+ trim_trailing_whitespace = ignore
+ end_of_line = ignore