Add support for checking Vim code with Vint.

README.md

@@ -34,6 +34,7 @@ name. That seems to be the fairest way to arrange this table.
 | JavaScript | [eslint](http://eslint.org/), [jscs](http://jscs.info/), [jshint](http://jshint.com/) |
 | Python | [flake8](http://flake8.pycqa.org/en/latest/) |
 | Ruby   | [rubocop](https://github.com/bbatsov/rubocop) |
+| Vim | [vint](https://github.com/Kuniwak/vint) |
 
 *^ Supported only on Unix machines via a wrapper script.*