Disable error handler

[EwenQuim]

Add an Engine option to replace the default error handler by a simple pass-through func (err error) error {return err}

[dylanhitt]

Could not be easily accomplished with this

#320

[dylanhitt]

Or is the idea that we provide both? Removing the functionality of #320 would be rather disruptive.

[EwenQuim]

We can provide both, second one as a shortcut. But yeah, waiting for linked PR to be merged (should be soon)

[Mankeylol]

Mind if I try this one?

[dylanhitt]

Hey, feel free to assign the issue to yourself. You probably want to base your work on #302 as the ErrorHandler is migrating to the Engine struct.