table relationship automation 

#### you can inject model:
```js
    var instance = $webSql.openDatabase("name", '1.0', 'Test DB', 2 * 1024 * 1024);
    instance.addModel("articleLight", "article", [{
        table : "comments",
        insertName : "comments",
        foreignKey : "article_id",
        primaryKey : "id",
    }],[{
        table : "user",
        insertName : "owner",
        foreignKey : "user_id",
        primaryKey : "id",
    }]);
```

#### query they
instance
    .selectModel("questionLight", buildSelector())
.then(function(questions){
	            console.log(questions)
		})