Add reference documentation on Github release uploads from Travis

Author: monochromata

.travis.yml

@@ -28,6 +28,7 @@ before_deploy:
   - find releases -maxdepth 1 -mindepth 1 -type d -exec tar -cvzf {}.tar.gz {} \;
 
 deploy:
+  # See https://docs.travis-ci.com/user/deployment/releases/
   provider: releases
   api_key:
     secure: "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"