CaveGenerator 0.13b Preset Update Guide

- There are actual comments now. The included presets
  prefer hash-style comments (line starts with ` #`).
- BlockFillers have now been replaced with CaveBlocks
  and WallDecorators.
  - BlockFillers that replace all air blocks are now
    essentially just CaveBlocks.
  - BlockFillers that decorate surfaces in some way
    are now WallDecorators.
- Removed lavaRules
  - use CaveBlocks, instead. See vanilla.cave.
- Removed tunnels.extensions. No replacement.
  - tunnels.matchingBranches can be used to achieve the
    previous tunnel size consistency that this was often
    used for.
- Noise changes
  - All noise related features are now contained in
    either a noise2D or noise3D block. See vanilla.cave
	for the actual fields that these contain.
  - This does mean that any noise features that
    previously existed are no longer stored at the same
	level. They are always, always stored inside of
	either noise2D{} or noise3D{}. This might be more
	tedious to write, but should increase clarity about
	indended functionality.
- The `biomes` block will no longer complain if some
  members no longer exist.
- There are no more `keys` fields. Instead, objects that
  previously contained them have been replaced with
  arrays. The objects that previously corresponded with
  `keys` are now listed directly inside of these arrays.
  - Keys previously served as identifiers for these
    objects. Comments should probably be used now in
	their place.
- Prefer opening brackets and braces on same line, not
  new line. This formatting will occur automatically, if
  presets are udpated.
- Renamed fields:
  - anything+Spacing -> frequency
    - This has the inverse effect. Convert between values
	  using 1 / x.
	- frequency should always be between 0-1, unlike
	  spacing.
  - noise2D blocks do not contain `variance` fields anymore.
    Instead, they contain both `minVal` and `maxVal`.
	- e.g. a variance of 5 -> { minVal : -5, maxVal : 5 }
  - spawnInPatches no longer exists anywhere.
    - This is now indicated by the presence of a noise
	  block.
	  - i.e. to simply enable spawnInPatches, you could
	    literally just add an empty noise block (but it must
		be the right kind--see vanilla.cave).
  - giantPillars.pillarState -> giantPillars.state
  - tunnels.vanillaNoiseYReduction -> tunnels.noiseYReduction
  - In many objects, `state` has been replaced with an array
    entitled `states`. Before 1.13 is officially released,
	it will not be necessary to include brackets when only
	one element is included. In other words, it will be
	possible to use this field just like before. This field
	has been renamed in:
	- CaveBlocks
	- WallDecorators
	- StoneClusters
	- LargeStalactites (but this change hasn't been made yet)