[Suggestion] Add option to make Oil spawn realistically

[Chris6ix]

Currently, the mod randomly selects chunks to have oil. That can cause them to be quite far from each other and for oil farms to look weird because they are so spread out.

An option to have the mod select chunks in a more realistic way would be nice, so that they more closely mirror oil deposits in real life, which are not small dots everywhere on the globe, but a few large, concentrated spots.