Add Geode Predictor for 1.6.4+

[konkers]

Requires the multiplayer ID so is only useful for dynamic seeding.

[PianoAddict]

this method of returning GetGeodeContents1_6_4 from within GetGeodeContents1_6 renders the 1_6 method non functional as the multiplayerID is not an argument in the 1_6 method. recommend leaving the 1_6 method unchanged (reverting the line 116 change) and adding 1_6_4 as a separate method.

[konkers]

Since the arguments to Utility.CreateRandom default to 0.0, previous to 1.6.4 the seedC value was 0. The seedC parameter is now multiplayerId / 2. Since GetGeodeContents1_6 is now calling GetGeodeContents1_6_4 with a multiplayerId of 0, that should generate same seeds as not specifying the seedC parameter and letting it default to 0..