Constructor confugration options

This changes the function signature of the constructor but allows us to
pass any options.
Mainly this is now used for the ipfs configs.

lib/utils/ipfs.js

@@ -5,7 +5,7 @@ class IPFS {
 
   constructor(config) {
     if (!config) {
-      config = {host: 'localhost', port: '5001', protocol: 'http'};
+      config = { host: 'localhost', port: '5001', protocol: 'http' };
     }
     this._ipfsAPI = ipfsAPI(config);
     this._config = config;