oneOf Schema Violation: Provide names for schemas

[tedepstein]

As discussed in my comments on #60, it would be very helpful to reference candidate schemas by a descriptive name, instead of a JSON Pointer. Names could be taken from the key in the definitions section, or the title keyword and/or from an extended property added to the JSON schema.

[tedepstein]

Also applies to anyOf.

[tedepstein]

@tfesenko , this was addressed in #108 and #110 . Closing, but please take a quick look & reopen if you think there is further work that still needs to be done on this.