update readme

Author: stevehu

CHANGELOG.md

@@ -8,6 +8,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 ### Added
 
 ### Changed
+- Sycn with official test suites and documented failed test cases.
 
 
 ## 0.1.2 - 2016-10-20

README.md

@@ -50,3 +50,15 @@ Add the following to your `pom.xml`:
 
 ```
 
+## Known issues
+
+I have just updated the test suites from the official website as the old ones were copied from another
+Java validator. Now there are several issues that need to be addressed. All of them are edge cases
+in my opinion but need to be investigated.
+
+[#7](https://github.com/networknt/json-schema-validator/issues/7)
+[#6](https://github.com/networknt/json-schema-validator/issues/6)
+[#5](https://github.com/networknt/json-schema-validator/issues/5)
+[#4](https://github.com/networknt/json-schema-validator/issues/4)
+
+