Separate handling errors

Prevent res.body from being called if res is not defined.
Close #16

lib/register-new-account.js

@@ -24,7 +24,11 @@ module.exports.create = function (deps) {
     function getTerms(err, res) {
       var links;
 
-      if (err || Math.floor(res.statusCode/100)!==2) {
+      if (err) {
+        return handleErr(err, 'Registration request failed: ' + err.toString());
+      }
+
+      if (Math.floor(res.statusCode/100)!==2) {
         return handleErr(err, 'Registration request failed: ' + res.body.toString('utf8'));
       }