stackbuilder - wizard: Allow apps to be targetting at specific

Log Message:
-----------
Allow apps to be targetting at specific platforms.

Modified Files:
--------------
wizard:
App.cpp (r1.22 -> r1.23)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/stackbuilder/wizard/App.cpp.diff?r1=1.22&r2=1.23)
AppList.cpp (r1.15 -> r1.16)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/stackbuilder/wizard/AppList.cpp.diff?r1=1.15&r2=1.16)
CMakeLists.txt (r1.5 -> r1.6)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/stackbuilder/wizard/CMakeLists.txt.diff?r1=1.5&r2=1.6)
wizard/include:
App.h (r1.10 -> r1.11)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/stackbuilder/wizard/include/App.h.diff?r1=1.10&r2=1.11)