update rdoc

README.rdoc

@@ -31,14 +31,15 @@ http://a1.mzstatic.com/us/r30/Publication/v4/2c/f7/90/2cf7902f-f709-9125-c73d-87
 
 == Platforms
 
-* Works completely on:
+* The build runs on Travis for:
   * MRI Ruby 1.8.7
   * MRI Ruby 1.9.2
   * MRI Ruby 1.9.3
-  * MRI Ruby Head
   * RBX
   * REE
-* For JRuby, everything works but Aruba; Aruba just doesn't work on JRuby for some reason, though this library *is* being used in production under JRuby 1.6.6
+  * JRuby in both 1.8 and 1.9 mode
+
+It should work on 2.0.0 but there's a weird bundler issue where some of the aruba tests fail in odd ways.
 
 == Bootstrapping a new CLI App