Galactic Unification - Cheaper War Demands

The idea for this mod came about because I got frustrated that it took too long to conquer my enemies in the late game. However, I realised that I could make something a bit more interesting than just a tech to make ceding planets for cheaper, since one could argue that the current techs cater sufficiently for ‘legitimate’ conquests, and so wanting to do it more is in essence saying you want to conquer everything, at which point one can’t expect the other empires to like one. So this mod introduces a late-game tech called ‘Galactic Unification’ available to non-pacifists who don't have enemies that are overwhelming towards them, which is more likely to turn up depending on how many planets the empire has and whether it is a militarist, etc. It offers 50% cheaper war demands for conquering planets and creating vassals. This makes it much easier to conquer your enemies quickly in the late game. The price is that everyone will hate you for it. Other empires with the tech will especially hate you, as you are declaring yourself their rival; the same goes for fallen and awakened empires. If you are playing a game with at least four fallen empires, a fallen empire with opposing ethics to you (or, if you are playing FEE, the militarist FE) is likely to awaken and pick a fight with you. Meanwhile, normal empires without the tech will gradually gain a positive modifier to each other, making it more likely the rest of the universe will come together and unite against the threat you pose. Since it is such a divisive tech, I've also added a policy that allows you to renounce your aim of galactic unification. This means you will no longer benefit from the tech's bonuses, but equally people will stop hating you (awakened empires will not go back to sleep, though). It becomes available ten years after you research the tech, and cannot be chosen when you are at war (there'd be some obvious exploits if that were allowed). The AI will choose to renounce if a hostile empire has an over