Finally Merge branch 'videosoftware-xfb'

This adds xfb support to the videosoftware backend, which increases it's
accuracy and more imporantly, enables the usage of many homebrew apps
which write directly to the xfb on the videosoftware backend.

Conflicts:
	Source/Core/VideoBackends/Software/SWRenderer.cpp
	Source/Core/VideoBackends/Software/SWmain.cpp

Source/Core/VideoBackends/Software/VideoConfigDialog.cpp

@@ -68,6 +68,9 @@ VideoConfigDialog::VideoConfigDialog(wxWindow* parent, const std::string& title,
 
 	// rasterizer
 	szr_rendering->Add(new SettingCheckBox(page_general, wxT("Hardware rasterization"), wxT(""), vconfig.bHwRasterizer));
+
+	// xfb
+	szr_rendering->Add(new SettingCheckBox(page_general, wxT("Bypass XFB"), wxT(""), vconfig.bBypassXFB));
 	}
 
 	// - info