stackbuilder - setupkit: Update installer images.

Log Message:
-----------
Update installer images.

Modified Files:
--------------
setupkit:
background.bmp (r1.3 -> r1.4)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/stackbuilder/setupkit/background.bmp.diff?r1=1.3&r2=1.4)
banner.bmp (r1.1 -> r1.2)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/stackbuilder/setupkit/banner.bmp.diff?r1=1.1&r2=1.2)