Fixed issues with C++ classes and hierachies across multiple source files.

Fixed imports test case & added run test.
Added Examples/imports.
Added typename for raw lua_State*
Added documentation on native functions.

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@9748 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Examples/test-suite/lua/imports_runme.lua

@@ -0,0 +1,28 @@
+require("import")	-- the import fn
+-- need to load two modules
+import("imports_a")	-- import code
+import("imports_b")	-- import code
+
+b=imports_b.B()
+b:hello() -- call member function in A which is in a different SWIG generated library.
+b:bye()
+
+assert (b:member_virtual_test(imports_a.A_memberenum1) == imports_a.A_memberenum2)
+assert (b:global_virtual_test(imports_a.globalenum1) == imports_a.globalenum2)
+
+imports_b.global_test(imports_a.A_memberenum1)
+
+--[[    B b = new B();
+    b.hello(); //call member function in A which is in a different SWIG generated library.
+
+            B b = new B();
+        b.hello(); //call member function in A which is in a different SWIG generated library.
+        b.bye();
+
+        if (b.member_virtual_test(A.MemberEnum.memberenum1) != A.MemberEnum.memberenum2)
+          throw new Exception("Test 1 failed");
+        if (b.global_virtual_test(GlobalEnum.globalenum1) != GlobalEnum.globalenum2)
+          throw new Exception("Test 2 failed");
+
+        imports_b.global_test(A.MemberEnum.memberenum1);
+]]