Update README.md

Author: gilbitron

README.md

@@ -1,2 +1,20 @@
-# edd-software-github-sync
-Sync GitHub releases with EDD downloads that use Software Licensing
+# Easy Digital Downloads - Software GitHub Sync
+Sync GitHub releases with EDD downloads that use Software Licensing.
+
+### Install
+
+Install the plugin and edit your desired Download. In the **Software GitHub Sync** metabox that appears,
+enable the sync and save the download.
+
+To setup the webhook on GitHub:
+
+1. On your GitHub repository navigate to: **Settings > Webhooks & services > Add webhook**
+1. Enter the generated Payload URL (found in the **Software GitHub Sync** metabox)
+1. Select **Let me select individual events** and untick "Push" and tick "Release"
+1. Add the webhook and check the ping is ok
+
+### Usage
+
+When creating a release in GitHub attach your ZIP using the "Attach binaries" upload box. The EDD download will
+automatically be updated with this new file and the current version number will also be updated with the "Tag version" 
+from the release.