Fix entities with passengers cannot travel thorough portal (MC-67).

Create custom world portal to travel between dimensions.

Fix hardcoded behavior of dimension mainly for custom dimension.

Add beta 1.7.3 world generation as separate dimension.

Create portal link between dimensions to make custom world sets.

Add superflat world type as separate dimension.

Add portal support to cart contraption, coupled cart, and compatibility with other portal mods.

Add amplified world type as separate dimension.

Add desert single biome world type as separate dimension.

Add large biomes world type as separate dimension.

Add vanilla dimensions while keeping the original dimensions.

Add mushroom fields single biome world type as separate dimension.

Add the void superflat world type preset as separate dimension.

Add forest biomes as separate dimension.

Add badlands biomes as separate dimension.

Add modified biome sources that can be configured.