Factory reset

[Jantar]

Complete reset of Lokus. WARNING, this also deletes all user cards and codes.
Procedure:
-approach master card to the Lokus
-wait for 13 double beeps and remove master card (13 is function for setting Lokus back to factory settings)
-in 3 seconds, after master card removal, approach any other card (confirmation of the function)
-if it is successful, first longer funny beeeeeep is heard and then Lokus confirms it with two beeps
-first card registered after reset is new master card