support for patternProperties

[fyyyyy]

This should be fairly simple i hope, since all it needs is to rename "properties" into "patternProperties" if a regex is detected as key

e.g.

object {
   string name;
   string /^[0-6]d/;
}

http://spacetelescope.github.io/understanding-json-schema/reference/object.html#pattern-properties