fixing issue #67

I'm just not that sure about WarningCode, but other than that it get you
the warning as soon as you missed you example on you values.
Merge pull request #95 from apiaryio/develop

Explicit integration test configuration
Merge branch 'rebase-develop'
Merge branch 'master' of https://github.com/apiaryio/snowcrash
Merge branch 'develop' of https://github.com/alikh31/snowcrash into develop