update readme

Author: codeBelt

README.md

@@ -19,3 +19,9 @@ Example application demonstrating react-hot-loader-3 with webpack-2, react and f
 ## staging tasks
 - $ `yarn staging` (staging build w/ server)
 - $ `yarn staging:build` (staging build)
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+###### Note: Saga's do not hot load. 
+> [Read more about the complexities](https://github.com/redux-saga/redux-saga/issues/22#issuecomment-218737951) and/or [implement yourself](https://gist.github.com/markerikson/dc6cee36b5b6f8d718f2e24a249e0491).
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