Publish data validator benchmark

[fredbi]

The validator provided by this package is quite fast
and it may be used independently from the go-swagger suite.

It would nice to compare it with other popular json validation package and publish the benchmark.
I am thinking of a comparison with:

• https://github.com/xeipuuv/gojsonschema
• some others listed in a post I left there some time ago (before discovering go-openapi 👍
  Is this a dead project? xeipuuv/gojsonschema#162

Since this would add some unwanted dependencies, it would be best to publish this as a separate repo.