Humidity for melons.

Lots of more templated code here. Use swap_node throughout. Each
plant has it's own properties table now, which trims the settings.txt
file. Will be easier to maintain and extend.

Had to add a withered texture for the melon plant... yes melon
plants will be able to wither on hard settings.

1 files changed, 0 insertions, 0 deletions

diff --git a/textures/crops_melon_plant_6.png b/textures/crops_melon_plant_6.png
new file mode 100644
index 0000000..f5fbe5e
--- /dev/null
+++ b/textures/crops_melon_plant_6.png