faker use `fixturesPath` to put there generated `dataFile`'s. I dont want to mixup  2 things: namespace and fixturesPath, because there is no namespace for plain data-files, and it can confuse end-user. However i am for moving `fixturesPath` to `faker` fixture class, with this we can also make autocreating directory, so user will not get exception that `fixturesPath` does not exists when he run `php yii fixture/generate`.