Skyhawk Science System v0.6.0 - "Balancing Act"

This release doesn't have any new mod support or things like that. Instead, I've done some basic rebalancing, and more importantly, added icons for nearly every tech node aside from the science, space stations, and control trees (those will come soon). Here's a sample:

https://imgur.com/a/r6yj4YQ

Sorry for how long that took. I've been busy and also a little burned out with all decisions and stuff related to localization and icon work.
And as always, this is still NOT gameplay ready!