Open Terrain Generator (OTG)

Forge:

New and improved world/dimension settings:
- Dimension settings in world config now work for the overworld too!
- Added new settings to the world config: PlayersCanBreakBlocks, ExplosionsCanBreakBlocks and PlayersCanPlaceBlocks, ItemsToAddOnJoinDimension, ItemsToRemoveOnJoinDimension, ItemsToAddOnLeaveDimension, ItemsToRemoveOnLeaveDimension, ItemsToAddOnRespawn, SpawnPointSet, SpawnPointX, SpawnPointY, SpawnPointZ, RespawnDimension, MovementFactor.
- Fixed WelcomeMessage and DepartMessage settings in the worldconfig.

Bugfixes:
- Fixed TPS/performance/lag issues caused by particles and spawners.
- Fixed a crash when cave rarity/frequency is set to 0.
- Fixed a crash with Ancient Warfare 2 structure generation.
- Fixed a bug with TF where entering a dimension with OTG+TF installed
would crash the game.
- Fixed a bug with lava in BO3's not being lit properly. (This needs to
be tested thoroughly, may cause lava-related bugs. MC docs say lava
should be opaque and opacity 255 but actual of Blocks.LAVA is 0, this
"fix" sets it to 255, which seems to fix some lighting bugs.)
- Fixed world border and pre-generation radius UI in world creation menu not working when using CustomMobSpawner/BOP.
- Implemented a forge population event when spawning animals.
- Fixed the pregenerator UI not always showing when joining a SP world with an pregenerator active.
- Solved a pregenerator UI crash when pressing F3.

* The fixes for lava lighting and allowing dimension settings for the overworld may have consequences for other mods, will mark this release as a beta initially until more testing has been done.