Vines update

vines/README.md

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+# Vines
+
+## Features
+- Rope block for spawning rope that slowly drops into the deep.
+- Vines are climbable and slowly grow downward.
+- Shears that allow the collecting of vines.
+- Spawns vines on jungletree leaves.
+- Roots on the bottom of dirt and dirt with grass nodes.
+- Spawns vines on trees located in swampy area.
+- Jungle vines that spawn on the side of jungletrees
+
+## API
+The API is very minimal. It allows the registering of vines and the spawning of
+existing vines on nodes of your own.
+
+If you want vines to spawn on a certain node then you can choose which vine by
+adding to the node groups the unique group of that vine. This is determined by
+the name of the vine ( see vines.lua ) appended with '_vines'.
+An example would be.
+
+"willow_vines" or "jungle_vines"
+
+There are two types of vines. One that spawns at the bottom of nodes and uses the
+plantlike drawtype, and vines that spawn on the side that use signlike
+drawtype. The type is determined by the spawn_on_side property in the biome
+table.
+
+### Example
+*taken from mod*
+
+```lua
+
+  vines.register_vine( name, definitions, biome )
+
+  --e.g.
+
+  vines.register_vine( 'vine', {
+    description = "Vines",
+    average_length = 9
+  }, biome )
+
+```
+
+### definitions
+|key|           type|  description|
+|---|           ---|   ---|
+|description|   string|The vine's tooltip description|
+|average_length|int|   The average length of vines|
+
+For biome definitions please see the [plants_lib API documentation](https://github.com/VanessaE/plantlife_modpack/blob/master/API.txt)
+
+## Notice
+Vines use after_destruct on registered leave nodes to remove vines from which
+the leaves are removed. This is done by using the override function.
+Malfunctions may occur if other mods override the after_destruct of these nodes
+also.