Release 2.7.1 (#58)

* preparing release 2.7.1

* enhanced readme

* added performance section

* updated javadoc and sources publishing

CHANGELOG.md

@@ -1,4 +1,14 @@
 # Change Log
 
+## 2.7.1 - 2020-09-03
+* Added build steps to compile X-Ray agent ZIP [PR #55](https://github.com/aws/aws-xray-java-agent/pull/55)
+* Added Benchmarking tests [PR #57](https://github.com/aws/aws-xray-java-agent/pull/57)
+* Added support for trace ID injection and plugins [PR #52](https://github.com/aws/aws-xray-java-agent/pull/52)
+* Added SQL instrumentation [PR #52](https://github.com/aws/aws-xray-java-agent/pull/52)
+* Converted agent architecture to be a DiSCo plugin rather than monolith [PR #52](https://github.com/aws/aws-xray-java-agent/pull/52)
+* Converted project to Gradle [PR #52](https://github.com/aws/aws-xray-java-agent/pull/52)
+* Added ability to configure agent via external JSON file [PR #33](https://github.com/aws/aws-xray-java-agent/pull/33)
+* Switched to use Apache Commons Logging [PR #32](https://github.com/aws/aws-xray-java-agent/pull/32)
+
 ## 2.4.0-beta - 2019-12-2
 Initial commit