Adding in ZIF-numbered lookups only

[ash4994]

ecogdata/ecogdata/devices/electrode_pinouts.py

Lines 408 to 417 in b1c3645

	zif_by_daq_lut = {'mux6': zif_by_mux6,
	'mux6_15row': zif_by_mux6_15row,
	'stim4': zif_by_stim4,
	'intan64': zif_by_intan64,
	'intan64_new': zif_by_intan64_new,
	'nanoz_3n1': zif_by_3n1_nano_z,
	'nanoz_p4': zif_by_p4_nano_z}

Want to add in a "zif_by_zif" mapping that is simply values ordered 1-61. This will be used for processing data that has been ordered to be ZIF ordered.