Update CHANGELOG.md

Author: clue

CHANGELOG.md

@@ -4,14 +4,16 @@ This file is a manually maintained list of changes for each release. Feel free
 to add your changes here when sending pull requests. Also send corrections if
 you spot any mistakes.
 
-## 1.0.0 (2014-05-xx)
+## 0.1.0 (2014-05-xx)
 
 * First stable release
 * Async SOCKS `Client` and `Server` implementation
 * Project was originally part of [clue/socks](https://github.com/clue/php-socks)
   and was split off from its latest releave v0.4.0
   ([#1](https://github.com/clue/reactphp-socks/issues/1))
 
+> Upgrading from clue/socks v0.4.0? Use namespace `Clue\React\Socks` instead of `Socks` and you're ready to go!
+
 ## 0.0.0 (2011-04-26)
 
 * Initial concept, originally tracked as part of