Add .editorconfig to generator root directory

Resolves #283

.editorconfig

@@ -0,0 +1,16 @@
+# EditorConfig is awesome: http://EditorConfig.org
+
+root = true;
+
+[*]
+#  Ensure there's no lingering whitespace
+trim_trailing_whitespace = true
+# Ensure a newline at the end of each file
+insert_final_newline = true
+
+[*.js]
+# Unix-style newlines
+end_of_line = lf
+charset = utf-8
+indent_style = space
+indent_size = 2