Added TabIface C++ wrapper for GUI::Tab C++ class,

exported the TabIface to Perl.

xs/xsp/typemap.xspt

@@ -207,6 +207,8 @@
 %typemap{Ref<PresetBundle>}{simple};
 %typemap{PresetHints*};
 %typemap{Ref<PresetHints>}{simple};
+%typemap{TabIface*};
+%typemap{Ref<TabIface>}{simple};
 
 %typemap{PrintRegionPtrs*};
 %typemap{PrintObjectPtrs*};