Added custom map sizes — Enigma Manor Steam update #1191229

Added the option for the host of a lobby to change the size of the map. This will allow newer players the chance to learn puzzles/game mechanics in a much smaller environment before delving into the full-scale manor. Since the large map is technically still the main game, most achievements are disabled for small and medium map sizes. Only 'Mastermind' and 'Runaway' will still be obtainable. This is only temporary as I do plan to add more achievements in the future. The number of zombies and resources will also change depending on the size of the map: Small Map 1 Floor (Around 40 rooms) 30 Enemies (1 special enemy type) 3 Ammo boxes per weapon 4 Puzzles Medium Map 2 Floors (Around 65 rooms) 40 Enemies (2 special enemy types) 4 Ammo boxes per weapon 8 Puzzles Large Map 3 Floors (Around 80 rooms) 50 Enemies (3 special enemy types) 5 Ammo boxes per weapon 12 puzzles I also added an objective...