Change the api to use a single method get_summary

A optative parameter "translated" is used to replace the need of
two diferent methods

Signed-off-by: Gonzalo Odiard <gonzalo@laptop.org>
Change get_name method for consistency

Use a optative 'translated' parameter like in get_summary method

Signed-off-by: Gonzalo Odiard <gonzalo@laptop.org>