export/generate json schema

Could you please add an option to get the schema as json schema?
I tried using a few 3rd-party libraries that claimed to be able to work with voluptuous and they all failed miserably.
I believe the best is to have this feature built-in as you know how to access/traverse the internals of voluptuous schema with all the validations, nestings etc.
That would be especially useful with modern IDEs that can validate yaml files versus json schema which could be automatically regenerated on any change of the voluptuous schema - you could immediately see the effect of your changes.