TFC Regrowing Forests

Added a plethora of new predicates, and an example of a json (for acacia) file can be seen below.

{
  "type": "tfcrf:regrowth",
  "leaves": "tfc:wood/leaves/acacia",
  "sapling": "tfc:wood/sapling/acacia",
  "chance": 3275,
  "spread_distance": 11,
  "min_y": 63,
  "max_y": 128,
  "min_light": 11,
  "max_light": 15,
  "min_temperature": 8,
  "max_temperature": 38,
  "min_rainfall": 90,
  "max_rainfall": 275,
  "min_forest_density": 0.2,
  "max_forest_density": 1.0,
  "min_forest_type": "edge",
  "max_forest_type": "old_growth",
  "months": [
	"january",
	"february",
	"march",
	"april",
	"may",
	"june",
	"july",
	"august",
	"september",
	"october",
	"november",
	"december"
  ],
  "fuzzy": true
}