pginstaller - pginst: Mention VIsta in the readmes

Log Message:
-----------
Mention VIsta in the readmes

Modified Files:
--------------
    pginst/lang:
        de_welcome.rtf (r1.11 -> r1.12)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/lang/de_welcome.rtf.diff?r1=1.11&r2=1.12)
        fr_welcome.rtf (r1.9 -> r1.10)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/lang/fr_welcome.rtf.diff?r1=1.9&r2=1.10)
        pt_br_welcome.rtf (r1.12 -> r1.13)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/lang/pt_br_welcome.rtf.diff?r1=1.12&r2=1.13)
        ru_welcome.rtf (r1.11 -> r1.12)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/lang/ru_welcome.rtf.diff?r1=1.11&r2=1.12)
        sv_welcome.rtf (r1.2 -> r1.3)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/lang/sv_welcome.rtf.diff?r1=1.2&r2=1.3)
        tr_welcome.rtf (r1.7 -> r1.8)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/lang/tr_welcome.rtf.diff?r1=1.7&r2=1.8)
    pginst/txt:
        welcome.rtf (r1.22 -> r1.23)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/txt/welcome.rtf.diff?r1=1.22&r2=1.23)