added WIP disclaimer (#6)


diff --git a/README.md b/README.md
index 2080c7a..3500a87 100644
--- a/README.md
+++ b/README.md
@@ -21,6 +21,8 @@
 
 A tool for running Apache Fluo applications in Hadoop YARN.
 
+**This is currently a work in progress that depends on unreleased features of Fluo and will not be ready for use until after Fluo 1.2.0 is released.**  Sometime after Fluo 1.2.0 is released this project will make its first release.
+
 ## Requirements
 
 The Fluo YARN launcher requires [Apache Fluo][Fluo] and [Hadoop YARN][YARN]: