Allow allOf to accept referenced schemas fix #119

[rodrigosetti]

No description provided.

[fizruk]

Thanks!

A minor note: don't bump version in a feature PR, releases are normally done separately, because:

• there might be other unreleased changes (there are in this case);
• you should not think about version numbers when implementing a feature.

[rodrigosetti]

Thanks. I would be happy to address your notes, but I see you already merged :)

Consider adding a CONTRIBUTING file, it's nicely supported by Github, there are projects where maintainers have the inverse rule (all PRs should increase version).

[fizruk]

@rodrigosetti yes, I guess I should add a CONTRIBUTING file, thanks for suggestion! :)