Announce that this project is no longer actively maintained

Author: Trevor Burnham

README.md

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 A fork of [JedWatson/React-Select](https://github.com/JedWatson/react-select/) with support for option groups.
 
 
+## :rotating_light: Project status :rotating_light:
+
+This fork is no longer actively maintained. The primary purpose of this project was to add option group support to react-select, a feature that will be supported in the upcoming react-select 2.0. Another alternative worth checking out is [downshift](https://github.com/paypal/downshift), which provides low-level building blocks for building custom dropdown components.
+
+
 ## Demo & Examples
 
 Live demo: [github.hubspot.com/react-select-plus/](http://github.hubspot.com/react-select-plus/)