Fix issue #66 on my own example, implementing get_val_txt(self, value) on my overriden field.
Resuelto el problema con la limpiexa de la búsqueda
Restore the code to use GET - again. The example works with GET and POST.
Restored test.db to old one
Merge pull request #69 from apalazon/master

Fixed test case for issue #66 with solution