A few more changes to README.

README.txt

-This is official Kaldi readme. Read Kaldi.md and INSTALL.md first!
 
-See http://kaldi-asr.org/ for documentation (may not always be fully up to
-date).  This documentation is generated by running "doxygen" from the src/
-directory, and appears in src/html/
 
-I assume that the reader would like to (1) build the toolkit and (2) run the
-example system builds.
+Please http://kaldi-asr.org/ for documentation on Kaldi.
 
 To build the toolkit: see ./INSTALL.  These instructions are valid for UNIX
 systems including various flavors of Linux; Darwin; and Cygwin (has not been