Hinder the use of PHP`s $Variables by making them atoms.

`$A` still denotes a `char`
…but `$AA` will be an `atom`.

```haskell
f($char) = $c
```

![46](https://cloud.githubusercontent.com/assets/278727/2757737/ad40471c-c987-11e3-9d62-f36e93ede329.png)