update README.md: reflect new repository owner

The repository owner of Java's `json-schema-validator`
has been changed from `fge` to `daveclayton`. Update
all occurrences.

Author: agebhar1

README.md

@@ -18,16 +18,14 @@ It uses the [org.json API](http://stleary.github.io/JSON-java/) (created by Doug
 # When to use this library?
 
 Lets assume that you already know what JSON Schema is, and you want to utilize it in a Java application to validate JSON data.
-But - as you may have already discovered - there is also an [other Java implementation](https://github.com/fge/json-schema-validator)
+But - as you may have already discovered - there is also an [other Java implementation][daveclayton/json-schema-validator]
 of the JSON Schema specification. So here are some advices about which one to use:
- * if you use Jackson to handle JSON in Java code, then fge/json-schema-validator is obviously a better choice, since it
-uses Jackson
+ * if you use Jackson to handle JSON in Java code, then [daveclayton/json-schema-validator] is obviously a better choice, since it uses Jackson
  * if you want to use the [org.json API](http://www.json.org/java/) then this library is the better choice
  * if you want to use anything else for handling JSON (like GSON or javax.json), then you are in a little trouble, since
 currently there is no schema validation library backed by these libraries. It means that you will have to parse the JSON
 twice: once for the schema validator, and once for your own processing. In a case like that, this library is probably still
-a better choice, since it seems to be [twice faster](https://github.com/erosb/json-schema-perftest) than the Jackson-based fge
-library.
+a better choice, since it seems to be [twice faster](https://github.com/erosb/json-schema-perftest) than the Jackson-based [daveclayton][daveclayton/json-schema-validator] library.
 
 
 ## Maven installation
@@ -235,3 +233,4 @@ SchemaLoader schemaLoader = SchemaLoader.builder()
 [ASL 2.0]: https://www.apache.org/licenses/LICENSE-2.0
 [Travis badge master]: https://travis-ci.org/everit-org/json-schema.svg?branch=master
 [Travis]: https://travis-ci.org/everit-org/json-schema
+[daveclayton/json-schema-validator]: https://github.com/daveclayton/json-schema-validator