Improved English Localisation

This mod aims to improve the text and dialogue throughout the game, both by correcting literally-unplayable typos and adding more dialogue for AI empires. In short: - Fixing a ton of typos; - Correcting innumerable instances of "planet" being used when the world in question is actually a moon; - Adding new dialogue for empires, mostly based on civics and origins (Mechanists, for instance, might flaunt their experience with robots); - The UNE and COM now use "U. N." and "Commonwealth" as their respective adjectives, rather than "Human" for both; - The nine standard planet classes now clarify, in their descriptions, whether they tend to have more food, minerals, or energy. Should be compatible with virtually all mods. Let me know if you see any text in the game that looks off, vanilla or with this mod, and I'll fix it.