Ideally category and search are fully optional, however some sites break if one or the other is not provided.
Unfortuntely `boards.ie` has a different page type for searches and I'm not bothered to implement a scraper from scratch.
In addition, removed comment limit options.
Capturing the instantiation of the database and dataset manager objects inside the try-catch will cause errors if something else fails.
If an exception occurs and the dataset_manager is not initialised, the code inside the catch block will fail.
