Fixed death rate and dark death rate behavior, Bone Meal success rate messages disabled for operators, added two new modifiers: 'needs-hoe-for-drops' and 'needs-hoe-for-farmland-retain'. Link to the custom biomes topic added to the config.yml.

Documentation for the new modifiers: https://github.com/lichenaut/PlantNerfer/blob/master/README.md#hoe-reliant-drops
Request custom biome support: https://github.com/lichenaut/PlantNerfer/issues/3