stellaris early civilization 1.0 file

Changelog:
* Merged "Massive Galaxies 2.1.1" (Merge)
* Fixed trading within Massive Galaxies (Bug)
* All ship components should now require corvettes to be researched first. (Immersion)
* CheAmical thrusters are marked as a starting tech again, this is so you can build corvettes after researching them, and because at this point in time you should have chemical thrusters for planetary aircraft. (Immersion)