stackbuilder - wizard: Added an option to download packages only (for

Log Message:
-----------
Added an option to download packages only (for installation on another machine).

Modified Files:
--------------
    wizard:
        AppList.cpp (r1.23 -> r1.24)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/stackbuilder/wizard/AppList.cpp?r1=1.23&r2=1.24)
        CompletionPage.cpp (r1.7 -> r1.8)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/stackbuilder/wizard/CompletionPage.cpp?r1=1.7&r2=1.8)
        InstallationPage.cpp (r1.11 -> r1.12)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/stackbuilder/wizard/InstallationPage.cpp?r1=1.11&r2=1.12)
    wizard/include:
        App.h (r1.15 -> r1.16)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/stackbuilder/wizard/include/App.h?r1=1.15&r2=1.16)
        CompletionPage.h (r1.2 -> r1.3)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/stackbuilder/wizard/include/CompletionPage.h?r1=1.2&r2=1.3)
        InstallationPage.h (r1.4 -> r1.5)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/stackbuilder/wizard/include/InstallationPage.h?r1=1.4&r2=1.5)