VC2012 - Edit&Continue needs /SAFESEH:NO

Thanks for adding the VC2012 build configuration to Introducer.

Edit & continue doesn’t work ‘out of the box’ because it also needs safe exception handling disabled, you could add something along these lines to disable it for debug only:

		link->createNewChildElement ("ImageHasSafeExceptionHandlers")->addTextElement ("false");

Thanks! I’ve just checked in a fix for that (hopefully… I’ve not actually got VC2012 to try it)