Prepare release notes for 1.0.0

Author: felixbarny

CHANGELOG.md

@@ -1,11 +1,34 @@
 # next
 
 ## Features
-* Added `Transaction.isSampled()` and `Span.isSampled()` methods to the public API
-* Added `Transaction#setResult` to the public API (#293)
 
 ## Bug Fixes
-* Capturing the username now properly works when using Spring security (#183)
+
+# 1.0.0
+
+## Breaking changes
+ * Remove intake v1 support. This version requires APM Server 6.5.0+ which supports the intake api v2.
+   Until the time the APM Server 6.5.0 is officially released,
+   you can test with docker by pulling the APM Server image via
+   `docker pull docker.elastic.co/apm/apm-server:6.5.0-SNAPSHOT`. 
+
+## Features
+ * Adds `@CaptureTransaction` and `@CaptureSpan` annotations which let you declaratively add custom transactions and spans.
+   Note that it is required to configure the `application_packages` for this to work.
+   See the [documentation](https://www.elastic.co/guide/en/apm/agent/java/master/public-api.html#api-annotation) for more information.
+ * The public API now supports to activate a span on the current thread.
+   This makes the span available via `ElasticApm#currentSpan()`
+   Refer to the [documentation](https://www.elastic.co/guide/en/apm/agent/java/master/public-api.html#api-span-activate) for more details.
+ * Capturing of Elasticsearch RestClient 5.0.2+ calls.
+   Currently, the `*Async` methods are not supported, only their synchronous counterparts.
+ * Added API methods to enable correlating the spans created from the JavaScrip Real User Monitoring agent with the Java agent transaction.
+   More information can be found in the [documentation](https://www.elastic.co/guide/en/apm/agent/java/master/public-api.html#api-ensure-parent-id).
+ * Added `Transaction.isSampled()` and `Span.isSampled()` methods to the public API
+ * Added `Transaction#setResult` to the public API (#293)
+
+## Bug Fixes
+ * Fix for situations where status code is reported as `200`, even though it actually was `500` (#225)
+ * Capturing the username now properly works when using Spring security (#183)
 
 # 1.0.0.RC1