The role of a BlockReplacement is to handle all instances where you need to replace 
one block with another. For instance, it can be used to raise or lower the water 
height, replace oceans with lava, replace leaves with diamond blocks, etc. The key 
is using the correct GenerationPoint, so that the replacement is done at the right 
time during generation.



addGenerationPoint:
    Arguments:
        String
    Usage:
        Generation_Point_ID
    Notes:
        Adds a generation point for this block replacement to be run at. Options in order of first to last occurance in generation are: "BIOME_BLOCK_REPLACEMENT", "POPULATE_CHUNK_PRE", "DECORATE_CHUNK_PRE", "DECORATE_CHUNK_POST", "POPULATE_CHUNK_POST", "WORLD_GENERATOR_FIRST", "WORLD_GENERATOR_LAST"