Add editorconfig

Author: aptx4869

.editorconfig

@@ -0,0 +1,22 @@
+# editorconfig.org
+root = true
+
+[*]
+end_of_line  = lf
+charset      = utf-8
+trim_trailing_whitespace = true
+insert_final_newline     = true
+
+[*.js]
+indent_style = tab
+
+[*.css]
+indent_style = space
+indent_size  = 2
+tab_width    = 2
+
+[*.coffee]
+indent_style = space
+indent_size  = 2
+tab_width    = 2
+