Improves docs.

README.md

@@ -4,6 +4,8 @@
 [![Build Status](https://travis-ci.org/jlowe64/moodle-logstore_xapi.svg?branch=master)](https://travis-ci.org/jlowe64/moodle-logstore_xapi)
 [![Gitter](https://badges.gitter.im/Join Chat.svg)](https://gitter.im/LearningLocker/learninglocker?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 
-- [Installation](docs/installation.md).
-- [Read documentation](docs/readme.md).
-- [Report bugs, enhancements, and questions](contributing.md#issue-templates).
+- [Installation](docs/installation.md)
+- [Report bugs, enhancements, and questions](contributing.md#issue-templates)
+- [Supported events](events.md)
+- [Developer documentation](developers.md)
+- [Plugin design](design.md)

docs/events.md

 # Supported Events
-This page documents the Moodle log events supported by this plugin.
+This page documents the [Moodle log events](https://docs.moodle.org/dev/Event_2) supported by this plugin.
 
 Moodle Event Name | xAPI Recipe Example
 --- | ---