model namespaces, moved point_xy to d2::point_xy, revised point_ll_deg to ll::point<degree>

[SVN r66975]

test/extensions/algorithms/offset.cpp

@@ -127,7 +127,7 @@ void test_all()
 
 int test_main(int, char* [])
 {
-    test_all<bg::model::point_xy<double> >();
+    test_all<bg::model::d2::point_xy<double> >();
 
     return 0;
 }