Proposal: Integration test checking examples on apiblueprint.org website

Builds on top of #19.

https://trello.com/c/ObThuTMy/1755-proper-testsuite-for-api-blueprint-api-app

Added integration test checking whether examples from apiblueprint.org website pass through correctly. This should prevent things like #16.
So what is the purpose of this test then? It should be part of gh-pages branch then