Update Kaldi engine documentation page

documentation/kaldi_engine.txt

@@ -15,7 +15,7 @@ active/inactive based on contexts in real-time.  It also provides basic
 infrastructure for compiling, recognizing, and parsing grammars with
 Kaldi, plus a compatible model.  For more information, see its page.
 
-Both this backend and kaldi-active-grammar are under development by
+Both this backend and kaldi-active-grammar have been developed by
 David Zurow (`@daanzu <https://github.com/daanzu>`_).
 Kaldi-backend-specific issues, suggestions, and feature requests are welcome
 & encouraged, but are probably better sent to the `kaldi-active-grammar