Update CHANGELOG and README

Author: ghidoz

CHANGELOG.md

@@ -1,3 +1,12 @@
+# [3.3.0](https://github.com/ghidoz/angular2-jsonapi/compare/v3.2.1...v3.3.0) (2016-11-01)
+
+### Bug Fixes
+- Override accept/content-type headers instead of adding ([#39](https://github.com/ghidoz/angular2-jsonapi/issues/39)) ([5c1f984](https://github.com/ghidoz/angular2-jsonapi/commit/5c1f984))
+- Remove "hard" dependencies to @angular packages and introduce peerDependencies ([#46](https://github.com/ghidoz/angular2-jsonapi/issues/46)) ([6efe0f8](https://github.com/ghidoz/angular2-jsonapi/commit/6efe0f8))
+
+### Features
+- Support error objects from JSON API specification ([d41ecb9](https://github.com/ghidoz/angular2-jsonapi/commit/d41ecb9))
+
 # [3.2.1](https://github.com/ghidoz/angular2-jsonapi/compare/v3.2.0...v3.2.1) (2016-10-13)
 
 ### Bug Fixes

README.MD

@@ -428,7 +428,7 @@ It's also possible to handle errors for all requests by overriding `handleError(
 ## TODO
 - [x] Deleting records
 - [ ] Conversion to and from `Date` property
-- [ ] Handling validation errors
+- [x] Handling validation errors
 - [ ] Updating or removing a relationship
 - [ ] [Explicit inverses](https://guides.emberjs.com/v2.8.0/models/relationships/#toc_explicit-inverses)
 - [ ] Loading an object's relationships