dockyard/party_foul — pull request #103 by tricknotes (2014-05-02 12:06:16+00:00)
Title: Fix issue labels format

Now, [Get a single issue](https://developer.github.com/v3/issues/#get-a-single-issue) API's response contains `labels` what format is Array of *object* (not an Array
of *string*)

Without this commit, the invalid request will be sent to
github API when the issue already has some labels.