Add initial integration tests infrastructure

[ro31337]

Within the vagrant virtual box, create initial integration tests infrastructure based on node.js + phantomjs. Example should be able to run two independent instances of headless browser pointing to the app. Example should be able to load and verify two pages (main and about) for correct loading and absence of javascript errors on these pages. No any chat logic should be covered at this point.

[ro31337]

Depends on https://github.com/devhq-io/hacktunnel/issues/3