Early Access version 103

This is a minor update to consolidate any improvements and bug fixes up to this point, as development will be suspended for the next 2-3 weeks. Nevertheless, it does include some cosmetic changes to all spacecraft (VF-class in particular), and also some important changes to weapon balancing (the Corn Shotgun in particular).

More details about this update can be found here: https://forum.chickeninvaders.com/t/early-access-version-103/20267