WIP #1: Rename function + add test

Attempt to address #2 

It appears the 2 word tests are only supported with a custom Node_Test class.
Will try to change that later this week.

### Todo
- [x] Create custom Node_Test class to allow for 'active feature' as test
- [ ] Update README
- [ ] More tests...
instead of all this complex logic to workaround the Twig bug, I would rather compile the test in an optimized way:

```php
$compiler
    ->raw('$this->getEnvironment()->getExtension(\'qandidate_toggle_twig_extension\')->is_active(')
    ->subcompile($this->getNode('node'))
    ->raw(')');
```

I know this hardcodes some stuff, but this is way faster than your magic logic (and it is what Twig would use when compiling once the bug is fixed)