pqa - pqa: Renaming the log readers to clarify their purpose

Log Message:
-----------
Renaming the log readers to clarify their purpose

Modified Files:
--------------
pqa/lib:
pqa.rb (r1.59 -> r1.60)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pqa/pqa/lib/pqa.rb.diff?r1=1.59&r2=1.60)
test_pqa.rb (r1.20 -> r1.21)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pqa/pqa/lib/test_pqa.rb.diff?r1=1.20&r2=1.21)