To install Coconuts into your Minecraft world, follow these instructions:

1. Be sure that you are in the latest Snapshot of 1.9 or latest version of 1.9. This is for Minecraft 1.9 and up! It has been tested in 15w50a and it will work in all snapshots past. This will not work in Minecraft 1.8 or below.
2. Copy the command from the txt file or pastebin
3. Open up your world
4. Into the chat, type: /give @p command_block
5. Find the spawn chunk* (There are many tutorials online on how to find the spawn chunk)
6. Place the command block on the west side of the spawn chunk. (The machine generates in the East Direction)
7. Open the command block by right clicking (Be sure to be in creative mode)
8. Use CTR + V (or CMD + V on mac) to paste in the command.
9. Power the command block with a lever, button, redstone torch, or redstone block on the side.

Coconuts are now installed your world, but you can right click one of the signs to fill 4 random Minecart Chests with Coconut Items.

*Placing the machine in the spawn chunk is necessary if you would like to venture away from the machine and still use Coconuts and Coconut Trees. If you are not using this for a survival world and only want to experiment with it, it is okay to place outside of the spawn chunk.

-Coconuts can be obtained from leaves
-Coconuts can be Soaked in water to create a plantable, soaked Coconut (Toss the item in a Cauldron of Water, or in Water)
-Soaked Coconuts can be planted by tossing the item onto tilled farmland
-Planted Soaked Coconuts appear to be stuffed into the ground and convert the tilled farmland to a grass path
-Coconut Trees grow block by block
-Coconut Trees die if you break any part of the trunk
-Coconuts grow at random speeds on their tree
-Coconuts start in a young phase of green, then turn brown when ready to be harvested
-Coconut trees die if planted too close to each other
-If you break the leaves that a Coconut is growing attached to, the Coconut will die if too young, or fall to the ground if it is ready to be harvested
-Falling Coconuts damage players
-Coconuts can be opened if tossed on the ground with shears
-Open Coconuts can be eated by holding it in your hand and looking up
-Open Coconuts can be poored into buckets to make Coconut Milk by tossing an Open Coconut and an Empty Bucket on the ground together
-Coconut Trees can be harvested for their wood before or after the Coconuts are grown (If you harvest the tree for wood, any growing Coconuts will stop growing, but ready Coconuts will just fall to the ground)
-Open Coconuts, Coconuts, and Soaked Coconuts can be placed like a block and broken without ruining the item
-Coconut Trees are nice looking =-)
-You have the option once the machine is installed turn 3 random Minecart Chests in abondoned mineshafts into Minecart Chest with Coconuts in them. (As another way to get Coconuts naturally)
-1.9+ Compatible
-Survival Friendly (And made specifically for Survival use)
-Polished to the point of that it is nearly impossile to find exploits
-Multiplayer Compatible

If you want to get a Coconut without breaking leaves, just right click the sign on the machine that says "Free Coconut".

If you want to instantly grow the nearest Green Coconut to a a read-to-be-picked brown, enter this command when you are next to the Coconut:
/scoreboard players set @e[tag=TreeCoconut,c=1] CoconutAge 49998

Coconut Trees are fairly fast to grow, Coconuts are fairly quick to soak, and Coconuts will fall immediately if you break the leaves above the Coconut.

Some of the links to Pastebin and the download use Adfly. By using the adfly links you are directly supporting the creator. When you open the page, just wait five seconds, then click the big yellow "skip ad" button at the top right. This will take you to the command.

Also, this is my creation. You are not allowed to claim this or a modified version of this as yours. But feel free to share with other people.