Simplify ValidationResult by removing the valid field.  We can just check the number of error messages instead.
Simplify ValidationResult by removing the valid field.  We can just
check the number of error messages instead.

stephensearles/gojsonschema,xyliuke/gojsonschema,mickep76/gojsonschema,brandur/gojsonschema,xeipuuv/gojsonschema,slapresta/gojsonschema,juju/gojsonschema,pki-io/gojsonschema,cristiangraz/gojsonschema,realglobe-Inc/gojsonschema,lylex/gojsonschema,sanathb/gojsonschema