This mode doubles the SD card speed (FTP upload speed ~350 kB/s compared to ~180 kB/s in SPI mode). Needs one PIN less but fixed PIN assignments
Add support for the PN5180 RFID reader:
PN5180 has better RFID range/sensitivity and can read ISO-15693 / iCode SLIX2 aka Tonies
* added a couple of JavaScript libraries
* added functions to main.cpp for file handling
* added websocket handller for index file notifications
* added webserver route for delivering file index
* refactored html notifications, introduced toastr