WIP Add timestream to enable, handle social activities and seed growth

[robob27]

VERY WIP. I started writing these updates on 0.47.5, not sure if it even works in 50.05, and have learned a lot more about DFhack since then. Will try to get around to finishing it up sometime soon. Anyone else feel free to take it over. You won't hurt my feelings 😅

[myk002]

lots of people ask about timestream. these updates will be welcomed