add very basic validator

validator/.ruby-version

+2.2

validator/Gemfile

+source "https://rubygems.org"
+
+gem "json-schema"

validator/Gemfile.lock

+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.3.8)
+    json-schema (2.5.1)
+      addressable (~> 2.3.7)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  json-schema
+
+BUNDLED WITH
+   1.10.6

validator/validate.rb

+#!/usr/bin/env ruby
+require "bundler/setup"
+require "json"
+require "json-schema"
+
+schema = File.read File.expand_path "#{__dir__}/../schemas/1.0/schema.json"
+json = JSON.parse(ARGF.read)
+
+messages = JSON::Validator.fully_validate(schema, json)
+
+if messages.empty?
+  puts "Everything valid!"
+else
+  puts messages
+end
+