code improvements -auto detect default age of bushes in worldgen -fix @reason tag in overwrite mixin -remove need to specify block settings in constructors -improve growing berry bush internals -fix blockstate flags

bugfixes -berry bushes are now flammable -recipes are now in the recipe book -fix misconfiguration in raspberry and blackberry bushes

misc -optimise textures to minimise jar size

new features -raspberries, blackberries, and gooseberries are now spiky -double berry bushes now generate naturally