Update README.md (#9)

Author: rabbah

README.md

@@ -18,8 +18,7 @@
 -->
 # incubator-openwhisk-runtime-rust
 
-Work in Progress! Do not use yet...
-It will be awesome.
+Work in Progress... It will be awesome!
 
 [![License](https://img.shields.io/badge/license-Apache--2.0-blue.svg)](http://www.apache.org/licenses/LICENSE-2.0)
 [![Build Status](https://travis-ci.org/apache/incubator-openwhisk-runtime-rust.svg?branch=master)](https://travis-ci.org/apache/incubator-openwhisk-runtime-rust)