[inaka/elvis-server#8] Build website.
[inaka/elvis-server#9] Added GitHub API functions.
[inaka/elvis-server#9] Added 204 as a valid API status code.
[#8] Delete webhook. Remove collaborator.
[#8] Merge.
Merge pull request #67 from inaka/jfacorro.elvis-server.8.build.website

[inaka/elvis-server#8] Added GitHub API calls for Elvis's website