simplify building of filtered alias lists from sbsv2 filtering prefs. Fix NPE when creating a build config that has errors and not platform or target.

Updated support for adding/removing missing SDK.

Fix problem with sbs config xml parsing. Make sure to trim error message to avoid erroneously adding an error when there is none. Fix problem with adding system includes for variants.

C:\c3_dev\hg\carbidecpp>First round of implementing variant build support and properly building projects that contain mi xed FEATUREVARIANT keywork in some MMPs and not others (see bug 11592)

revised remaining welcome page icons for C3

Make use of system include paths returned by Raptor config query.