Question: Just parse without need to create a QueryParser (aka rql.MustNewParser)

As I know, I need to create a parser to be able to parse the query into params. Like:

```go
QueryParser = rql.MustNewParser(rql.Config{
Model: User{},
FieldSep: ".",
})

// and then ...

params, err := QueryParser.Parse(query)
```

What I want is a way to just parse the raw query without care about the other stuff. Something like:

```go
params, err := rql.RawQuery(query)
```

So it will produce the same result as `QueryParser.Parse` but without any aditional steps validating the data, checking struct tags etc.

There is any method to do something like that?