sequelize/sequelize — pull request #991 by snit-ram (2013-10-15 10:03:50+00:00)
Title: Filters throgh relations

Adding support for filtering data through relationships. Good examples of this can be found in the file `test/associations/multiple-level-filters.test.js`

Here is the added behavior:

```js
Task.findAll({
where: {
'project.user.username': 'leia'
}
}).success(function(tasks){
//...
});
```

By running this code, it sequelize will interpret the where clauses adding all the necessary joins to able to run the filter.

Hope you guys like it and consider the merging