jsonschema needs a method to report *all* errors in an instance

[b5]

currently we only have one usable Method for Validation:

jsonschema.RootSchema.ValidateBytes(data []byte) error

That bails on the first error it sees.

We need a method that collects all known errors in a slice of bytes. I'm thinking it's signature should look like this:

jsonschema.RootSchema.Errors(data []byte) ([]string, error)

the slice of string should be the result of appending err.Error() to the result anytime err != nil in the validation stack. the function should only return error != nil if the data won't parse.

[handrews]

You may be interested in json-schema-org/json-schema-spec#396 related to this, about a possible suggested error output format.