Add editorconfig

Author: f3l1x

.editorconfig

@@ -0,0 +1,19 @@
+# EditorConfig is awesome: http://EditorConfig.org
+
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+indent_style = space
+indent_size = 4
+tab_width = 4
+
+[{*.neon,Makefile}]
+indent_style = tab
+indent_size = 4
+
+[*.{yml,yaml}]
+indent_size = 2