Add TODO section to README

Author: lukemelia

README.md

@@ -96,4 +96,9 @@ The following properties are expected to be present on the deployment `context`
 
 [1]: http://ember-cli.github.io/ember-cli-deploy/plugins "Plugin Documentation"
 [2]: https://github.com/zapnito/ember-cli-deploy-build "ember-cli-deploy-build"
-[3]: https://github.com/zapnito/ember-cli-deploy-s3 "ember-cli-deploy-s3"
+[3]: https://github.com/zapnito/ember-cli-deploy-s3 "ember-cli-deploy-s3"
+
+## TODO
+
+Some deployment flows require side-by-side deployment of compressed and uncompressed
+assets. A PR to add this option would be welcome.