Allow to import members from object by name

Wrap object members so they do not require dispatch receiver
Hack jvm backend to make it work

core/descriptors/src/org/jetbrains/kotlin/descriptors/FunctionDescriptor.java

@@ -30,6 +30,7 @@ public interface FunctionDescriptor extends CallableMemberDescriptor {
     @Override
     FunctionDescriptor getOriginal();
 
+    @NotNull
     @Override
     FunctionDescriptor substitute(@NotNull TypeSubstitutor substitutor);