Adding linting to a.js integrations

@calvinfo @amillet89 Do we need to add anything to the test/style.json? I also wasn't sure what the go was with the Makefile, so I just added all the bits in that looked relevant :)
though you could grep for IIFEs and that'd probably find most of them. something like this might get you started:

```sh
$ grep -iER "\(function.*(\(\)\)|\)\(\))" .
```