add editorconfig

Author: erik168

.editorconfig

@@ -0,0 +1,38 @@
+root = true
+
+[*]
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[**.js]
+indent_style = space
+indent_size = 4
+
+[**.css]
+indent_style = space
+indent_size = 4
+
+[**.less]
+indent_style = space
+indent_size = 4
+
+[**.styl]
+indent_style = space
+indent_size = 4
+
+[**.html]
+indent_style = space
+indent_size = 4
+
+[**.tpl]
+indent_style = space
+indent_size = 4
+
+[**.json]
+indent_style = space
+indent_size = 4
+
+[*.md]
+trim_trailing_whitespace = false