v1.2.0 - internal improvements to hull (ship) definitions

This has been in beta for a little while and nothing major has come up so we're releasing it and moving on with v1.3.0 which adds controller support! Beta for that should be out soon :-)

1.2.0 Change Log

• Restructured the way ships ("hulls") are defined in code and text files. Now each ship has its icon, texture, and text-based data under a single directory named for the ship.

• We've created a guide on How to Add a New Ship based on this version.

Guide: http://steamcommunity.com/sharedfiles/filedetails/?id=481833955