A configurable version of the vanilla GenLayerBiome. Replaces the heat map with a 
pseudo-random weighted biome map.



Constructor:
    Arguments:
        long, GenLayer
    Argument Usage:
        base layer seed, parent layer
    Notes:
        Constructs the layer with its seed and parent layer.

addBiome:
    Arguments:
        String, Non_Null_Biome_ID, int
    Usage:
        biome type, biome ID, weight
    Notes:
        Adds the provided biome id to the provided type with the provided weight. Type options are "Ocean", "Desert", "Warm", "Cool", "Icy".

addBiome:
    Arguments:
        String, Non_Null_Biome_ID
    Usage:
        biome type, biome ID
    Notes:
        Adds the provided biome id to the provided type with a weight of 1. Type options are "Ocean", "Desert", "Warm", "Cool", "Icy"

setSpecialBiome:
    Arguments:
        String, Non_Null_Biome_ID
    Usage:
        biome type, biome ID
    Notes:
        Sets the special biome for the provided type. Type options are "Ocean", "Desert", "Warm", "Cool", "Icy".

setSpecialVariantChance:
    Arguments:
        String, int
    Usage:
        biome type, chance
    Notes:
        Sets the chance for the special variant biome to be used for the provided type. The chance is 1 in the provided number. Type options are "Ocean", "Desert", "Warm", "Cool", "Icy".

setSpecialVariantChance:
    Arguments:
        int
    Usage:
        chance
    Notes:
        Sets the global chance for the special variant biome to be used. This will set the chance for all types. Set this before you set specific ones or it will overwrite. The chance is 1 in the provided number.

setSpecialVariantBiome:
    Arguments:
        String, Non_Null_Biome_ID
    Usage:
        biome type, biome ID
    Notes:
        Sets the special variant biome for the provided type. Type options are "Ocean", "Desert", "Warm", "Cool", "Icy".