Log Message:
-----------
Cover all implemented operators in the README, which is the only documentation currently
Modified Files:
--------------
prefix:
Makefile (r1.12 -> r1.13)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/prefix/prefix/Makefile?r1=1.12&r2=1.13)
README.txt (r1.12 -> r1.13)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/prefix/prefix/README.txt?r1=1.12&r2=1.13)