Merge pull request #269 from moshisushi/master

Add note about Node > 4.x requirement to README.md

Author: RichardLitt

README.md

@@ -17,6 +17,7 @@ IPFS API wrapper library in JavaScript
 ```bash
 $ npm install --save ipfs-api
 ```
+**Note:** ipfs-api requires Node v4.x (LTS) or higher.
 
 #### Running the daemon with the right port
 
@@ -117,4 +118,4 @@ MIT.
 
 # Want to hack on IPFS?
 
-[![](https://cdn.rawgit.com/jbenet/contribute-ipfs-gif/master/img/contribute.gif)](https://github.com/ipfs/community/blob/master/contributing.md)
+[![](https://cdn.rawgit.com/jbenet/contribute-ipfs-gif/master/img/contribute.gif)](https://github.com/ipfs/community/blob/master/contributing.md)