adds a dead time after the power injection has been cut off

comment and text fixing in ohmpy and modification of the interrogation array to have something actually working for demonstration

version testée sur l'ohmpi. Correction de bugs mineurs. Le code fonctionne et ferme les tickets #3 et #5

the append_and_save function has been modified because it is not possible to use the feather binary format on an arm architecture. Move to a simple csv file for saving #5

bugs fixed on prints at the beginning of the file and all parameter values are gathered in one place

Add a function for the quadripole file import that features a test to verify that electrode index do not exceed the maximum number of electrodes (issue #2)

modification de la fonction switch_mux(): lors de l'activation des port, il faut forcer le type des variables pour qu'elles ne soient pas du type array.