Adjustable ratio of continental and oceanic plates/land vs sea

[AndyProk]

Currently, the land/sea ratio seems to be fixed. Yes, the sea level can be adjusted, but that's not quite the same thing (and doesn't seem to work in the current release of WorldEngine).

In other words, what I'm missing is a way to modify the ratio of continental plates vs. oceanic plates. Currently, it seems that that hovers below 27% land (for just 3 plates), less if there are more plates (due to both more collisions and more divergence: the former reduces land area by piling it vertically, the latter primarily increases sea area). It would be nice to be able to pass the initial ratio as another argument.