Merge pull request #36 from ipfs/feature/usage

Fill out Usage section

Author: Lars Gierth

README.md

@@ -19,7 +19,7 @@ This will download the source into `$GOPATH/src/github.com/ipfs/go-ipfs-api`.
 
 ## Usage
 
-...
+See [the godocs](https://godoc.org/github.com/ipfs/go-ipfs-api) for details on available methods. This should match the specs at [ipfs/specs](https://github.com/ipfs/specs/tree/master/api); however, there are still some methods which are not accounted for. If you would like to add any of them, see the contribute section below.
 
 ## Contribute